So this thread got me proactive again and I took my Rocket valve out of my MR2 and stuck it in my EMR5. With the current setup I was cycling at ~250 psi and shooting 200fps, reliably. Much more reliable than my VS2 valve setup. Shouldn't take too much to get it to field velocity.
Good luck with your valve, they are so fun to tinker with.
I like Spyders.
MR1, MR2 LP, EMR5 LP, EM-1, Raven Primal, Victor, Fenix.
Magfed Hurricane with T15 Mags