Ok, I am not sure if your trolling or not. But moving solids are impossible.
Um I did it once but the Piston lost control. So I forgot how to do this.
Not what he's asking. He's asking how to make Piston move! So he can make a save where it does. If I am not mistaking.
Check your inbox and if you click on the link you'll understand him. Sighs* not trying to be a d$#/.
Same here I just realized that. It was hard to understand him at first, but I still don't know what he's asking.