Here are a few more tests, just to show what I'm seeing and where the project is at testing wise, I don't think its a final design.
My camera batteries were low so I wasn't picky on the video I kept, they died after the last test so this is it for now.
Retro Valve with 0.74" on/off pin>
Retro Valve #2 with 0.75" on/off pin. 40 psi to OLTR. Full RT effect, I cuffed a few times but didn't have the camera batter to re shoot.
Retro Valve #2 0.75" on/off pin about 43-44 psi boarder line full RT which my lazy finger like.