I am a happy camper. Tonight I was measuring the distance between my dies to see how much room I have for tooling. There was only 4", but I realized that I could loosen and slide the rocker valve up a couple inches giving me 6". Checking out how the hammer runs with the rocker valve all the way up surprised the heck out of me! Now when I apply a small amount of air the tup will dance without striking the dies, and as I increase exhaust, I can tap the work, slam hard, or anything in between. This is great!