Even Vacuum

What’s the best way to tell if I’m getting an even vacuum along my entire dick? Sometimes I’m not sure if the middle shaft is really getting the full vacuum, especially since during the second and third sets the upper part of the shaft and the lower head pack the tube (I think I’m not 100% sure about the bottom because it’s hard to see).

Just twist or rotate the tube so you can see the underside. As long as you are not fully packed 360 degrees around, the pressure is reaching your entire shaft. You are fully packed when you can see skin pressed against the inner wall of the tube, 360 degrees around.

If you really want to get optimum even vacuum….water pumping!

Sparkyx

As long as there is one single air space in the tube, the pressure is even to within a tiny fraction of a percent. The only way to get uneven pressure would be if you pack the tube somewhere in the middle, completely filling it at that point, so that you have two air spaces with not a hair’s breadth of connection between them. Pressures even out incredibly fast.