Ohhhhhhhhhh Gunny ... I know somebody is gonna be having a great time for quite awhile with that gun. Took mine awhile to get it just right but patience and a positive attitude will go a long way with that Impact. I think the first thing I would do is check out the measurements on that hammer spring tension ... mine caused so much erratic behavior until I locked it in place but now it stays put and I can focus on pellets, the power wheel and the the valve settings. Don't be afraid to think a little outside the box because the Impact was designed outside the box.
Darn good choice with the Aztec also, you got yourself a first class outfit there Gunny. Post some groups when you have the time.