Originally Posted by Spider!
That sounds like the washer stack in the reg is stacked as a solid pack instead of alternating curvature. That, or some serious sticking on the piston.
Hmm! The thought crossed my mind that I haven't removed the piston itself from the front of the reg assembly. I'll have to get the c-clip off and check it out. The stack is packed correctly and well lubricated so they aren't sticking.