That’s awesome. With the layered compressible wraps, it’s easy to get a tight enough clamp that there’s no backflow. It’s also possible to go REALLY tight with relative comfort, even dangerously so in my opinion. As in crushing nerves and soft tissues.
There’s a zone where over a small amount of tightening, the shaft gets much harder, and the clamp might move slightly toward the base and there’s a feeling of locking in as outflow is completely cut off. It really doesn’t take much more than that to stop backflow and get a really good seal that will hold through most any squeeze.
Anyway, just throwing out the proverbial cautions. Play it safe, use just as much tightness is needed to “lock in” or cut off backflow. With the right wraps you can go quite a bit tighter, and it adds a lot to the risks but it doesn’t add much benefit at all.
Also the PF extender sounds great. It looks like the best vacuum extender system, although I’ve never tried it. I am familiar with hanging, and I know getting in lots of hours and duration under stress is taxing. The PF seems to make it easy and comfortable on the body (posture, stealth abilities) and the attachment system seems a step above as well. I might try it some day. Currently just maintaining at 7+ length until I get to 5+ girth territory.
Before 5.5" x 4.1" ///////// Now 7.4" x 4.9"