Hi guys, thanks for help with the air tank, got an issue with my invert mini now, the air efficiency on it has dropped quite alot, tried a few things to combat this, new derlin bolt, new designz v3 bolt, plus spring kit, and dropped the reg pressure down on the marker to 170 psi ish, from 200, used to get really good air efficiency on it, but used it 2 weeks ago and i used a 1000 psi and only shot 400 rounds, any suggestionss guys? alsotried various dwell settings with no luck