The vulcan 3 is easy to take apart to reach the regulator
1: unscrew the 2 bolts that hold on the stock
2: unscrew / loosen the bleed screw
3: loosen the 2 different size hex screws that hold the entire plenum tube and tank onto the rifle.
4: unscrew the rifle end of the plenum tube ( with the transfer port )
5: you can now reach in with a threaded rod and screw it into the regulator and pulle it out, or you can unscrew the other end from the other stuff there ( block and tank ) and from that end push out the regulator, i do that myself with my cleaning rod.
At the range, it take me less than 5 min to strip the gun or get the regulator out, make a change on it and put it back in and install everything.
Right at the bench no problemo,,,, well unless you have forgotten to tighten the bleed screw, then you get a shock when you try to put pressure back in the gun,,,,, nothing dangerous just a shock.