But i still can not figure out the whole shooting blanks all the time when i see the balls going down the feed tube.
The feed tube for the omen has a ledged step. On my Omen using an EggII, I get a ball stuck every now and then on that ledge. (The Egg's feed tube it thinner than the ledge of the Omen and every now and then a ball seems to get caught in some manner on that ledge) I am planning on getting a new feed tube if I can find a replacement with matching threads.
As for your barrell match with paint ... it is very important to have the correct fit with the Omen since there is no ball detent. If your paint is falling out of your barrell then you have a loser of a match. I would expect you to break a lot of paint because to get your FPS up .... you are going to have to run a higher pressure. This pressure will blow up the paint in the barrell.
As was said earlier, the screw is in your trigger or you could not shot ... it is just the screw is in a long way and it looks like it is missing. If you want to confirm this ... remove your grip cover and you can see it in the grip frame.
Breaking your tank? Not sure about this bud ... but I know some tanks treads may be a little different or bent and this might cause it to be hard to screw on.
The 10 ball recocking issue is most likely due to your reg pressure being way to high from the bad paint match ... and your cocking pressure then gets wacky when this happens ... I had my reg turned up too high and had this same issue. I have since then turned my reg down to around 220 psi (from 300 psi) and my FPS shot is stable and the recocking is fine. You will have to adjust the recocking pressue any time you adjust your main reg pressure.
I have no idea on the CO2 issue ...
PS .... Does anyone know what threading the Omen feed tube is ... Angel?