So back to the OP, then. The first screen showed I was producting 33.82 , with 1 turn to grow and 15 turns to get PT. The last screen, however, showed I was producing 10.72 with 1 turn to grow and 10 turns to PT. Based on this discussion, if I had left it alone I would have grown the next turn and had to spillover into the next citizen growth. By not leaving it alone, I had little or (maybe) no spillover, and then I have to repick the tiles after the growth. So in the end, did I accomplish something, or nothing? I can see how the loss of 1 by manual tile selection can make a difference over the course of the game, but that does not seem to have anything to do with the micro itself and min/maxing turn time.