Hey It looks really good!!
Madison, you may want to contact my team leader, Dave Kelly(not from indiana) and ask him about our regenitive pneumatic circuit
davekelly@cyberportal.net is his email
Basically when you extend your arm it will move reallllllly slow as the pnuematic extends, but when its retracted, it saves air and goes much faster...
give him a note..we did it last year, and worked wonderfully