Hi soulfilcher!
Thanks for the mod, it's very funny and useful

I've got this recurring exception after I place a Metal Drum:

1542112897260 -----------------------------------------
1542112897261 STACK TRACE
1542112897261 -----------------------------------------
1542112897262 function: update -- file: SMetalDrumGlobalObject.lua line # 151
1542112897263 function: checkRain -- file: SMetalDrumSystem.lua line # 44
1542112897263 function: EveryTenMinutes -- file: SMetalDrumSystem.lua line # 124
java.lang.RuntimeException: __lt not defined for operand
at se.krka.kahlua.vm.KahluaUtil.fail(KahluaUtil.java:83)
at se.krka.kahlua.vm.KahluaThread.luaMainloop(KahluaThread.java:902)
at se.krka.kahlua.vm.KahluaThread.call(KahluaThread.java:167)
at se.krka.kahlua.vm.KahluaThread.pcall(KahluaThread.java:1922)
at se.krka.kahlua.vm.KahluaThread.pcallvoid(KahluaThread.java:1777)
at se.krka.kahlua.integration.LuaCaller.pcallvoid(LuaCaller.java:67)
at se.krka.kahlua.integration.LuaCaller.protectedCallVoid(LuaCaller.java:130)
at zombie.Lua.Event.trigger(Event.java:37)
at zombie.Lua.LuaEventManager.triggerEvent(LuaEventManager.java:61)
at zombie.GameTime.update(GameTime.java:1013)
at zombie.gameStates.IngameState.UpdateStuff(IngameState.java:432)
at zombie.gameStates.IngameState.update(IngameState.java:1370)
at zombie.gameStates.GameStateMachine.update(GameStateMachine.java:101)
at zombie.GameWindow.logic(GameWindow.java:688)
at zombie.GameWindow.run(GameWindow.java:1314)
at zombie.GameWindow.maina(GameWindow.java:1090)
at zombie.gameStates.MainScreenState.main(MainScreenState.java:184)