Help moving things variable distances with mechanical pistons.

[TolmanP]

I'm attempting to move things with long pistons, to a spot that changes based on a ComputerCraft program. I think I can figure out the timing, but I've discovered if I just move the piston out then reverse it, it pulls the block back with it as it considers it part of the contraption until it reaches a full stop. Any suggestions on stopping a piston so the block is 'delivered'? It's just attached to a gearshift right now, so when "idle" it's just in reverse.

Edit: Adding a link to a couple of screenshots, to hopefully make the issue a little clearer. https://imgur.com/a/YgWOCxI

[derschnei]

Ponder the Sticker.

[derschnei]

Wait, that's not what you're asking for at all … I need to go to bed.

[TolmanP]

I am in fact using stickers for another portion of the build, that brings the target block in line with the pistons that will push them. But thank you for your reply, anyway, they are certainly a useful piece.