Finally you made a contraption that is actually pretty unique!, one problem.... It can be compacter, cheaper and faster!, I even made another design (which also could be used vertically)
Gotta say, this is probally something I'll use in my future creations :P!
Thanks flip, I'm making a 7 floor get out alive area and this is going to be a part of something big. That's why I'm keeping it one block high. Other things it can be used for are in the works. And yes the setup you have there is nice as well.