I did a reseal on my vet. O-rings were shot. Wouldn't hold air no more. So I did a disassemble of the gun and installed new o-rings. I took the reg apart to replace the o-rings on the inside. (Stupid on my part) When I reassembled the gun, now I can't get it to shoot. Evidently I screwed the reg up when I took it apart. So to get me back shooting, I read where several have put Huma regs in the vet. So that's what I did. (Again, stupid on my part!) I installed the Huma and it leaks out the vent hole however I have it oriented in the gun. Now I'm up poop creek in a leaky canoe without a paddle!