diff --git a/maps/mountain_fortress_v3/icw/linked_chests.lua b/maps/mountain_fortress_v3/icw/linked_chests.lua
index bebca019..4ad43aef 100644
--- a/maps/mountain_fortress_v3/icw/linked_chests.lua
+++ b/maps/mountain_fortress_v3/icw/linked_chests.lua
@@ -9,6 +9,7 @@ local Math2D = require 'math2d'
 local WPT = require 'maps.mountain_fortress_v3.table'
 local Session = require 'utils.datastore.session_data'
 local AG = require 'utils.antigrief'
+local Core = require 'utils.core'
 local Discord = require 'utils.discord_handler'
 
 local this = {}
@@ -434,7 +435,7 @@ local function refresh_main_frame(data)
                                 chestitem.enabled = false
                                 chestitem.tooltip = '[Antigrief] You have not grown accustomed to this technology yet.'
                             end
-                            Gui.set_data(chestitem, {name = nil, unit_number = unit_number, share = source_chest.share.name})
+                            Gui.set_data_parent(volatile_tbl, chestitem, {name = nil, unit_number = unit_number, share = source_chest.share.name})
                         end
                     end
                 end
@@ -724,7 +725,8 @@ local function gui_closed(event)
         if not data then
             return
         end
-        data.frame.destroy()
+        Gui.destroy(data.volatile_tbl)
+        Gui.destroy(data.frame)
         this.linked_gui[player.name] = nil
     end
 end
@@ -1084,10 +1086,24 @@ Event.add(
 Gui.on_click(
     item_name_frame_name,
     function(event)
-        local data = Gui.get_data(event.element)
+        local player = game.get_player(event.player_index)
+        local player_data = this.linked_gui[player.name]
+        local element = event.element
+        if not player_data then
+            Gui.remove_data_recursively(element)
+            return
+        end
+        local parent = player_data.volatile_tbl
+        if not parent or not parent.valid then
+            Gui.remove_data_recursively(element)
+            return
+        end
+
+        local data = Gui.get_data_parent(parent, element)
         if not data then
             return
         end
+
         local button = event.button
 
         local _, _unit_number, share_container = fetch_share(data.share)
@@ -1095,15 +1111,12 @@ Gui.on_click(
             local container = fetch_container(data.unit_number)
 
             if button == defines.mouse_button_type.right then
-                local player = game.get_player(event.player_index)
-                if player and player.valid then
-                    Where.create_mini_camera_gui(player, {valid = true, name = share_container.share.name, surface = share_container.chest.surface, position = share_container.chest.position}, 0.7, true)
-                end
+                Where.create_mini_camera_gui(player, {valid = true, name = share_container.share.name, surface = share_container.chest.surface, position = share_container.chest.position}, 0.7, true)
                 return
             end
 
-            AG.append_scenario_history(event.player, container.chest, event.player.name .. ' linked chest (' .. data.unit_number .. ') with: ' .. share_container.share.name)
-            create_message(event.player, 'Linked chest', container.chest.position, share_container.chest.position)
+            AG.append_scenario_history(player, container.chest, player.name .. ' linked chest (' .. data.unit_number .. ') with: ' .. share_container.share.name)
+            create_message(player, 'Linked chest', container.chest.position, share_container.chest.position)
             container.linked_to = _unit_number
             container.chest.link_id = share_container.link_id
             container.link_id = share_container.link_id
@@ -1112,6 +1125,9 @@ Gui.on_click(
 
             this.linked_gui[event.player.name].updated = false
             refresh_main_frame({unit_number = container.unit_number, player = event.player})
+            if element and element.valid then
+                Gui.remove_data_recursively(element)
+            end
         end
     end
 )
@@ -1138,6 +1154,18 @@ local function on_player_changed_position(event)
     end
 end
 
+function Public.clear_linked_frames()
+    Core.iter_connected_players(
+        function(player)
+            local data = this.linked_gui[player.name]
+            if data and data.frame and data.frame.valid then
+                data.frame.destroy()
+            end
+            this.linked_gui[player.name] = nil
+        end
+    )
+end
+
 function Public.reset()
     this.main_containers = {}
     this.linked_gui = {}
diff --git a/maps/mountain_fortress_v3/stateful/blueprints.lua b/maps/mountain_fortress_v3/stateful/blueprints.lua
index edb73763..a88aed78 100644
--- a/maps/mountain_fortress_v3/stateful/blueprints.lua
+++ b/maps/mountain_fortress_v3/stateful/blueprints.lua
@@ -28,21 +28,22 @@ function Public.blueprint()
     surface.request_to_generate_chunks({0, 0}, 1)
     surface.force_generate_chunk_requests()
 
-    local item = surface.create_entity {name = 'item-on-ground', position = position, stack = {name = 'blueprint', count = 1}}
-    if not item then
-        return
-    end
-
-    local ents = surface.find_entities_filtered({type = {'unit-spawner', 'tree'}, area = {{position.x - 70, position.y - 70}, {position.x + 70, position.y + 70}}})
+    local ents = surface.find_entities_filtered({area = {{position.x - 70, position.y - 70}, {position.x + 70, position.y + 70}}})
     if #ents == 0 then
         return
     end
+
     for _, e in pairs(ents) do
         if e and e.valid then
             e.destroy()
         end
     end
 
+    local item = surface.create_entity {name = 'item-on-ground', position = position, stack = {name = 'blueprint', count = 1}}
+    if not item then
+        return
+    end
+
     local success = item.stack.import_stack(bp)
     if success <= 0 then
         local ghosts = item.stack.build_blueprint {surface = surface, force = 'player', position = position, force_build = true}
diff --git a/maps/mountain_fortress_v3/stateful/gui.lua b/maps/mountain_fortress_v3/stateful/gui.lua
index 211b4f6a..02fead89 100644
--- a/maps/mountain_fortress_v3/stateful/gui.lua
+++ b/maps/mountain_fortress_v3/stateful/gui.lua
@@ -946,6 +946,7 @@ local function update_raw()
             collection.gather_time = 0
             if not collection.gather_time_done then
                 collection.gather_time_done = true
+                LinkedChests.clear_linked_frames()
                 stateful.final_battle = true
                 Public.set('final_battle', true)
             end
diff --git a/maps/mountain_fortress_v3/stateful/main.lua b/maps/mountain_fortress_v3/stateful/main.lua
index 1c79f07c..9eab6373 100644
--- a/maps/mountain_fortress_v3/stateful/main.lua
+++ b/maps/mountain_fortress_v3/stateful/main.lua
@@ -53,7 +53,7 @@ Event.on_nth_tick(
             shuffle(area)
 
             WD.set_spawn_position(area[1])
-            Event.raise(WD.events.on_spawn_unit_group, {fs = true, bypass = true, random_bosses = true})
+            Event.raise(WD.events.on_spawn_unit_group, {fs = true, bypass = true, random_bosses = true, scale = Public.stateful.scale(20, 100)})
             return
         end
 
@@ -65,4 +65,6 @@ Event.on_nth_tick(
     end
 )
 
+Event.add(defines.events.on_pre_player_died, Public.on_pre_player_died)
+
 return Public
diff --git a/maps/mountain_fortress_v3/stateful/table.lua b/maps/mountain_fortress_v3/stateful/table.lua
index 86827143..274d0e03 100644
--- a/maps/mountain_fortress_v3/stateful/table.lua
+++ b/maps/mountain_fortress_v3/stateful/table.lua
@@ -158,6 +158,67 @@ local move_all_players_token =
     end
 )
 
+local search_corpse_token =
+    Token.register(
+    function(event)
+        local player_index = event.player_index
+        local player = game.get_player(player_index)
+
+        if not player or not player.valid then
+            return
+        end
+
+        local pos = player.position
+        local entities =
+            player.surface.find_entities_filtered {
+            area = {{pos.x - 0.5, pos.y - 0.5}, {pos.x + 0.5, pos.y + 0.5}},
+            name = 'character-corpse'
+        }
+
+        local entity
+        for _, e in ipairs(entities) do
+            if e.character_corpse_tick_of_death then
+                entity = e
+                break
+            end
+        end
+
+        if not entity or not entity.valid then
+            return
+        end
+
+        entity.destroy()
+
+        local text = player.name .. "'s corpse was consumed by the biters."
+
+        game.print(text)
+    end
+)
+
+local function on_pre_player_died(event)
+    local player_index = event.player_index
+    local player = game.get_player(player_index)
+
+    if not player or not player.valid then
+        return
+    end
+
+    local surface = player.surface
+
+    local map_name = 'boss_room'
+
+    local corpse_removal_disabled = Public.get('corpse_removal_disabled')
+    if corpse_removal_disabled then
+        return
+    end
+
+    if string.sub(surface.name, 0, #map_name) ~= map_name then
+        return
+    end
+
+    Task.set_timeout_in_ticks(5, search_corpse_token, {player_index = player.index})
+end
+
 local locomotive_market_pickaxe_token =
     Token.register(
     function(count)
@@ -667,14 +728,18 @@ function Public.migrate_and_create(locomotive)
         return
     end
     local position = locomotive.position
+    local inc = 6
+    local new_position = {x = position.x, y = position.y + inc}
 
-    for _, entity in pairs(carriages) do
-        if entity and entity.valid and entity.unit_number ~= locomotive.unit_number then
-            local new_position = {x = position.x, y = position.y + 5}
-            local new_wagon = surface.create_entity({name = entity.name, position = new_position, force = 'player', defines.direction.north})
-            if new_wagon and new_wagon.valid then
-                position = new_position
-                ICW.migrate_wagon(entity, new_wagon)
+    for index, entity in pairs(carriages) do
+        if index ~= 1 then
+            if entity and entity.valid and entity.unit_number ~= locomotive.unit_number then
+                local new_wagon = surface.create_entity({name = entity.name, position = new_position, force = 'player', defines.direction.north})
+                if new_wagon and new_wagon.valid then
+                    inc = inc + 7
+                    new_position = {x = position.x, y = position.y + inc}
+                    ICW.migrate_wagon(entity, new_wagon)
+                end
             end
         end
     end
@@ -874,5 +939,6 @@ Public.apply_startup_settings = apply_startup_settings
 Public.scale = scale
 Public.stateful_spawn_points = stateful_spawn_points
 Public.sizeof_stateful_spawn_points = #stateful_spawn_points
+Public.on_pre_player_died = on_pre_player_died
 
 return Public
diff --git a/maps/mountain_fortress_v3/stateful/terrain.lua b/maps/mountain_fortress_v3/stateful/terrain.lua
index 0058b909..56bb56e7 100644
--- a/maps/mountain_fortress_v3/stateful/terrain.lua
+++ b/maps/mountain_fortress_v3/stateful/terrain.lua
@@ -108,7 +108,7 @@ local function void_tiles(p)
 end
 
 local function enemy_spawn_positions(p)
-    if p.x < 200 and p.x >= -212 then
+    if p.x < 230 and p.x >= -242 then
         return false
     end
     return true
@@ -233,9 +233,11 @@ function Public.heavy_functions(data)
         return
     end
 
-    border_chunk(p, data)
-    oozy_tiles(p, data.seed, data.tiles)
-    draw_rails(data)
+    if p.y < 250 then
+        border_chunk(p, data)
+        oozy_tiles(p, data.seed, data.tiles)
+        draw_rails(data)
+    end
 end
 
 return Public
diff --git a/maps/mountain_fortress_v3/table.lua b/maps/mountain_fortress_v3/table.lua
index ef5c478f..b43b69ef 100644
--- a/maps/mountain_fortress_v3/table.lua
+++ b/maps/mountain_fortress_v3/table.lua
@@ -220,6 +220,7 @@ function Public.reset_main_table()
         redraw_mystical_chest_cost = 3000
     }
     this.collapse_grace = true
+    this.corpse_removal_disabled = false
     this.locomotive_biter = nil
     this.disconnect_wagon = false
     this.collapse_amount = false
diff --git a/modules/biter_health_booster_v2.lua b/modules/biter_health_booster_v2.lua
index 8d57c7c7..83628905 100644
--- a/modules/biter_health_booster_v2.lua
+++ b/modules/biter_health_booster_v2.lua
@@ -8,8 +8,6 @@ local Event = require 'utils.event'
 local LootDrop = require 'modules.mobs_drop_loot'
 local WD = require 'modules.wave_defense.table'
 local Global = require 'utils.global'
-local Task = require 'utils.task'
-local Token = require 'utils.token'
 
 local floor = math.floor
 local insert = table.insert
@@ -90,20 +88,6 @@ local entity_types = {
     ['unit-spawner'] = true
 }
 
-local function clear_unit_from_tbl(unit_number)
-    if this.biter_health_boost_units[unit_number] then
-        this.biter_health_boost_units[unit_number] = nil
-    end
-end
-
-local removeUnit =
-    Token.register(
-    function(data)
-        local unit_number = data.unit_number
-        clear_unit_from_tbl(unit_number)
-    end
-)
-
 local function loaded_biters(event)
     local cause = event.cause
     local entity = event.entity
@@ -379,7 +363,7 @@ local function on_entity_died(event)
     local wave_count = WD.get_wave()
 
     if health_pool then
-        Task.set_timeout_in_ticks(30, removeUnit, {unit_number = unit_number})
+        this.biter_health_boost_units[unit_number] = nil
         if health_pool[3] and health_pool[3].healthbar_id then
             if this.enable_boss_loot then
                 if random(1, 128) == 1 then
diff --git a/modules/rpg/settings.lua b/modules/rpg/settings.lua
index fde9c911..e53affce 100644
--- a/modules/rpg/settings.lua
+++ b/modules/rpg/settings.lua
@@ -709,15 +709,11 @@ function Public.extra_settings(player)
 
     Gui.set_data(save_button, data)
 
-    if not main_frame or not main_frame.valid then
-        return
-    end
-
-    player.opened = main_frame
     if not main_frame or not main_frame.valid then
         return
     end
     main_frame.auto_center = true
+    player.opened = main_frame
 end
 
 function Public.settings_tooltip(player)
diff --git a/modules/wave_defense/main.lua b/modules/wave_defense/main.lua
index 75d419fe..2a1ded7a 100644
--- a/modules/wave_defense/main.lua
+++ b/modules/wave_defense/main.lua
@@ -1141,18 +1141,20 @@ local function spawn_unit_group(fs, only_bosses)
         end
     else
         event_data.boss_wave = true
-        local count = 30
+        local count = fs.scale or 30
         event_data.spawn_count = count
         for _ = 1, count, 1 do
-            local random_boss = (random(1, 100) == 1)
+            local random_boss = (random(1, 60) == 1)
             local biter = spawn_biter(surface, spawn_position, fs, random_boss, unit_settings)
             if not biter then
                 Public.debug_print('spawn_unit_group - No biter was found?')
                 break
             end
             unit_group.add_member(biter)
+            if random_boss then
+                raise(Public.events.on_entity_created, {entity = biter, boss_unit = true, target = target})
+            end
         end
-        Public.set('boss_wave', false)
     end
 
     generated_units.unit_groups[unit_group.group_number] = unit_group
diff --git a/utils/gui.lua b/utils/gui.lua
index 57b8b59d..495afdc2 100644
--- a/utils/gui.lua
+++ b/utils/gui.lua
@@ -101,6 +101,35 @@ function Public.set_data(element, value)
 end
 local set_data = Public.set_data
 
+-- Associates data with the LuaGuiElement. If data is nil then removes the data
+function Public.set_data_parent(parent, element, value)
+    local player_index = parent.player_index
+    local values = data[player_index]
+
+    if value == nil then
+        if not values then
+            return
+        end
+
+        values[parent.index] = nil
+
+        if next(values) == nil then
+            data[player_index] = nil
+        end
+    else
+        if not values then
+            values = {}
+            data[player_index] = values
+        end
+
+        if not values[parent.index] then
+            values[parent.index] = {}
+        end
+
+        values[parent.index][element.index] = value
+    end
+end
+
 -- Gets the Associated data with this LuaGuiElement if any.
 function Public.get_data(element)
     if not element then
@@ -117,6 +146,30 @@ function Public.get_data(element)
     return values[element.index]
 end
 
+-- Gets the Associated data with this LuaGuiElement if any.
+function Public.get_data_parent(parent, element)
+    if not parent then
+        return
+    end
+    if not element then
+        return
+    end
+
+    local player_index = parent.player_index
+
+    local values = data[player_index]
+    if not values then
+        return nil
+    end
+
+    values = values[parent.index]
+    if not values then
+        return nil
+    end
+
+    return values[element.index]
+end
+
 -- Adds a gui that is alike the factorio native gui.
 function Public.add_main_frame_with_toolbar(player, align, set_frame_name, set_settings_button_name, close_main_frame_name, name, info, inside_table_count)
     if not align then