It's my pleasure to inform you all that I have finally found Puzzle #12 with the "modified" master builder. That seems to work then...

So, with everything done now, I have to think about new ways to keep my villagers busy: what will happen if I set them all to breeding? or keep them all busy researching even though I have everything fully researched? will they explore new ways for better living...? even solve the alien abduction riddle?

If I'm successful in any way or the other, I will let you know (and then I might even register here... )