I just updated the last post, of mines. You might want to take a look at it. I'm won't be able to answer your floating valve issue, as to I don't have any problem with mines. Set it and go. I'm aiming for 5-6 months on a full filled paintball tank 20z and 24oz. There was an updated on 11/11 (Low 700ish psi) a few pages back, at the moment it's still holding strong at above 600ish psi.
Yeah, I keep my needle valve closed and then turn on my ASA on/off. I have noticed that adjusting the tightness on the needle valve nut does affect how steady the rate stays. I just need to find the perfect tightness. Thanks for the quick replies btw.