Just trying to find a source ahead of time. I think I got the latest problem solved we been having a lot of problems w/ the cylinders on the PLF as far as speed or lack of. Air pressure is good, seals in the cylinders are good and well lubed, no air leaks or pinched air lines, piston and the foot moves freely. But when you swap the pistons around, the problem moves to a different spot[not one of the cylinders that was moved]. We changed out the control valves and that seems to help. They act like some of them are starved for air but the problem started with out any one changing any thing. I have not seen much about wood woking machines in the forums, and just wanted to make sure I was in the right spot.