I'm trying to make stairs that extend out and in and it involves a double piston extender. I've made the extender but the last piston won't stick to the stair so it just stays one block behind the rest of the stairs. I'm on ps4 so maybe that has something to do with it but I really want it to work. I also don't have room for immovable blocks because I need to keep it kind of small. Please help me.