yeah, I had already tried on the top and i couldn't get anything to happen. also with regards to the redstone pulse, i set up the logic for a timer the long way(i.e. not an awesome RP timer) and it didn't seem to affect it. Its not really needed until you get the whole process to work. So i started debugging by just throwing a lever every time I set up a new position because it was faster. Anyway, I'm not sure if I tried the bottom, ill do that and update the thread.