Originally Posted by thingmomo
just got my demon back from Vanguard US today go to air it up leaks from grip frame and does some odd sputtering cant shot it or even air up for that matter.
You're going to find that is likely a bad shuttle o-ring. Pull the shuttle and check he two inner and two outer o-rings. Likely the front outer o-ring has a scratch or tear in it. Just replace it with the spares you would have gotten after the upgrade. (I'm assuming it was there for the upgrade.)