KrzysD i think your selling yourself short , it works perfectly now thank you for all your help. i'll be sure to pester you more if i find another bug ^^

Thanks KrzysD for all your help.

New problem, i can open the tab at the top and seclect what i want to upgrade from and to I then save and close it but when i try to open it again i get this error:

just checked and I am on 0.12.13 i even reinstalled just to make sure, no success however. I also tried the mod all on its own in a new game as well just to make sure it wasnt a mod conflict I got the same error. The only other thing i can think of that isnt normal is I forced automated construction...

Hey i've also been having some troble getting this mod to work, i was having the same error as above as well after using the new control.lua file i'm now getting the error in my atachment.