Unireg operating characteristics

[Sharkytrav]

I read here a little while back that some reg or other operated better when there was a big difference from input to output pressure. Like it preferred taking 850 input pressure to send 400 into the marker.

I got my hands on a few unireg and black ice AA regs for various projects. Does anybody know if they have that kind of optimal pressure differential or any other fun facts about using unireg style hprs?

thanks!