I you haven't checked already, here's the tuning guide for the Level 10 Automags Online - Resources: The Level 10
As far as the other stuff, I've never really done any of that to any of my mags and have never had any issues. The only thing I have done is adjust the trigger rod to be closer to the back of the trigger to eliminate a little bit of slop. You will want to be able to slide a credit card between the trigger rod and the trigger when the gun is aired up. Some people have had good luck with the ULT in a classic valve. But since there is not a large force pushing the on/off pin like in the RT or X-Valves, you will probably get a lot of chuffing if you're not really careful.