--- SeaBlock_0.4.4/control.lua.orig	2020-04-13 15:31:33.075321135 +0200
+++ SeaBlock_0.4.4/control.lua	2020-04-13 15:31:12.159116043 +0200
@@ -89,21 +89,36 @@
 local function init()
   setpvp()
   global.unlocks = {
-    ['angels-ore3-crushed'] = 'sb-startup1',
-    ['basic-circuit-board'] = 'sb-startup2',
-    ['algae-green'] = 'bio-wood-processing',
+    ['angels-ore3-crushed'] = {'sb-startup1'},
+    ['basic-circuit-board'] = {'sb-startup2'},
+    ['algae-green'] = {'bio-wood-processing'},
+    ['lab'] = {},
   }
   if game.technology_prototypes['sct-automation-science-pack'] then
-    global.unlocks['lab'] = 'sct-automation-science-pack'
+    table.insert(global.unlocks['lab'], 'sct-automation-science-pack')
   else
-    global.unlocks['lab'] = 'sb-startup4'
+     table.insert(global.unlocks['lab'], 'sb-startup4')
+  end
+  if game.technology_prototypes['deadlock-stacking--sb-algae-green-tool'] then
+     table.insert(global.unlocks['algae-green'], 'deadlock-stacking--sb-algae-green-tool')
   end
+  if game.technology_prototypes['deadlock-stacking--sb-angelsore3-tool'] then
+     table.insert(global.unlocks['angels-ore3-crushed'], 'deadlock-stacking--sb-angelsore3-tool')
+  end
+  if game.technology_prototypes['deadlock-stacking--sb-basic-circuit-board-tool'] then
+     table.insert(global.unlocks['basic-circuit-board'], 'deadlock-stacking--sb-basic-circuit-board-tool')
+  end
+  if game.technology_prototypes['deadlock-stacking--sb-lab-tool'] then
+     table.insert(global.unlocks['lab'], 'deadlock-stacking--sb-lab-tool')
+   end
 end
 local function haveitem(player, itemname, crafted)
   local unlock = global.unlocks[itemname]
   -- Special case for basic-circuit because it is part of starting equipment
   if unlock and (itemname ~= 'basic-circuit-board' or crafted) then
-    player.force.technologies[unlock].researched = true
+    for _, name in ipairs(unlock) do
+      player.force.technologies[name].researched = true
+    end
   end
 end
 
@@ -134,9 +149,11 @@
   if not inv then -- Compatibility with BlueprintLab_Bud17
     return
   end
-  for k,v in pairs(global.unlocks) do
-    if not player.force.technologies[v].researched and inv.get_item_count(k) > 0 then
-      haveitem(player, k, false)
+  for k,vs in pairs(global.unlocks) do
+    for _,v in ipairs(vs) do
+      if not player.force.technologies[v].researched and inv.get_item_count(k) > 0 then
+        haveitem(player, k, false)
+      end
     end
   end
 end)