I have an Altarous regulator, in a Marauder, that leaks. When you fill gun to 3,000psi, regulator is at 1600psi. It slowly creeps to fill pressure. You can shoot 5 shots and it goes back to 1600psi but slowly creeps to fill pressure. I have changed all o-rings about 5 times and no joy. The regulator is 9 months old. When l got it and installed in gun, l wasn't impressed with the strings, l was getting. Put gun in safe to work on later (bad move). Altarous told me how to read regulator pressure instead of fill pressure. This showed me why string were not good. Instructions say not to take regulator apart as only Altarous can do it properly. They have no interest in me sending it in so l'm out of luck. I am looking to replace the Altarous with a Huma or lane. Any down side to either one? Thanks, Don