OK, I'm looking for something specific. My Senior Design team seems to think we have to buy a high-dollar actuator (fancy-pants engineering term) to do this but I don't think we do. Here is what I need: 1. Dual-action pneumatic cylinder with a 6" stroke capable of moving 10lbs or less (probably around 4lbs, no side load) 2. It has to operate at no less than 50"/second 3. Ideally, it'd do a full cycle (up and down) in 230ms or less. One direction can be as slow as 170ms but the other direction needs to make up for it I have 250psi@5cfm right now but I can get whatever is necessary. Hydraulics is an option but since we're moving a small load we don't deem it necessary. Do you guys have any suggestions on where to look?