All LCD and IR3 angels came from the factory with a dwell of 14, and seeing as to how WDP is the inventor of the marker, they've probably got a pretty good idea of what the dwell should be (I don't think they're getting any kick back from the Scuba companies, so wasting air and lowering the efficiency of their marker out of the package wouldn't be in their best interest). If you have a HALO B, Odyssey recommends setting your dwell to 16 or 17, but with the HALO, it basically comes down to how lucky you are. I have one that works like a dream on my LCD, but chops like a blender on my IR3 for seemingly no reason whatsoever. Matter of fact, I'm actually thinking about selling my IR3 and trying to get ahold of a Force4.
I set my LCD's MROF to 20 as soon as I got it. Until you get some practice on the trigger you'll probably never be able to hit anything close to that anyway, so it doesn't really matter.
I had the input pressure from my angel AIR at 450 psi on my LCD with all stock parts. I've heard alot of people tell me that's impossible, but I took out all my LP shims, backed the screw almost all the way out of the mini reg and had 285 fps every time I played.
Before you even play with your Angel, go to
www.angel-owners.com. You can search for everything and anything pertaining to the Angel, and it's probably been answered. They also have an online manual there, and the sponsors are some of the best techs in the world.
Enjoy