SpudFiles

I was screwing around with my KNEX and i realized that the gray wheels fit perfectly in 2" pvc. I put a piece of 1.5" pvc between 2 KNEX wheels with a chunk of a rubber glove over one end and a few layers of duct tape. There are holes in the wheels that pistons need in the normal piston set-up.

i had noticed that too but i never understoof some things so it never really came through with me. great i see my ideas flying to others. good job 8)