After receiving my missing part from Bill T. I was able to assemble the "20." Man, with that side 2nd stage adjustment port the thing breathes beyond belief. Cracking pressure is 0.5" H20 so I'm a bit worried about freeflow with Case Geometry Fault, but we will see.
Diving around here has been lousy recently. Hoping to get out and test this reg, and others, soon.
Here are a few SHR I've rebuilt lately. The Conshelf 20 is the only one I haven't taken into the ocean yet.