Pat,
To add to what Ray said, I am adding a link to a post I made on the earlier version of this regulator. I really liked how it performed, but there were some issues with it and Vincent asked for them all to be sent back for replacement - these are the replacements that he is posting about now, and I can't wait for mine to show up in the mail.
The best way for us PCP shooters to think of a regulated gun is that it functions more like a multi-pump pneumatic that refills automatically after each shot - the regulated air space is only about 15 ccs or less, so that is all the air you have to work with on each shot. Since the pressure is lower you have to tune for more air flow to get the higher energy levels easy to do, but still different in how we approach it.
With the regulator, I was only able to get the gun up to 29 FPE with JSB 18.1 grain pellets (which is still pretty good), and more energy will require some modifications that I am prepared to make. In contrast, right now the gun is tuned to work "normally" off approximately a 2000 psi fill, and it has no problem hitting 32 FPE - that is because the full 215cc reservoir is working on the shot now, and it was only the small regulated space before with the regulator. But as you can see from the post linked here, I was able to easily get 39 shots with an ES of less than 10 FPS:
viewtopic.php?f=29&t=8161Vincent - looks great! I can't wait! Is it just an illusion in the picture, or is the regulated air space "spacer" a little longer than the prior regulators ?
Alan