Well, I’ve been having a bit of a play with the impact to try and find a good useful power range on the dial and air flow valve, without needing to alter either the reg pressure or the hammer spring tension. At the moment its on 95 bar reg pressure. I’d appreciate any feedback from the FAC air lads on here, who know more about this than I do, regarding my current set up. First, using jsb 16 grain exact on minimum setting on the power wheel, and air flow on the first line they’re doing 737fps (19.3 ft lb). Air flow on line 2 they’re at 778fps (21.5 ft lb) and on line 4 they’re doing 811fps (22.