I am very happy with my Crosman 3622. I have worked on the trigger, valve and barrel. I installed a .177" transfer port and bored the valve and barrel to the same size. It gets 20 shots around 18 ft/lbs with 16.01 JTS pellets. The trigger is nice and accuracy is good out to 30 yards, for sure. I pick it up to pest around the house and it is so easy to pump back up. I added a Buck-Rail fill cap, adaptor and modular moderator. Today I ordered a Magnum Air power trigger, just because this gun deserves a metal trigger now. I put brass shims around the barrel bands, and re-crowned the barrel while trying to get accuracy, but I think the JTS pellets might have been all it took. While I am pleased, I am wondering what effect opening up the end of the valve would have. (picture stolen screen shot from Al's Airguns YouTube channel. Why is that hole so tiny?