Sorry, I couldn't find anything about this in Search. I know how to convert the Master Builder, I have the right power, I've tried it with 5 different villagers and still keep running up against the same problem. Even the villager I trained *only* in building wont stay on task! He keeps running off to do something else. And once he's left the spot, it resets the puzzle, so its no good bringing him back. If you've solved this, how did you keep him at it?
Thanks

edit: BTW, I really looooove this game!