I was trying something out: You know Star Trek? I wanted to make a transportpad and i try to get this working on a pictureframe which as you know has 8 settings, to transport yourself to another transportpad which has also 8 settings all over your world. The hard part is getting the 'activate it now' option in it and it has to be only for the people who are standing in front of the selector which could be like 154-156 by 66 by 594-596 just to be sure that those spaces occupied by any person transports to the preset you select. Commandblocks don't work on pistons, so i need pistons to break or power a block. I'm still trying this. If you have any ideas about the positioning, that is very much appreciated. I do use Forge and redstonepaste mod on 1.8.8 because of the fine lines, but use the comparator and repeaters from standard, they operate a bit different than the redstonepaste version.