I Pump primarily at 5in-Hg with a ring on. I build it up to 9-10in-Hg (in about 10 minutes) and then release. I remove the cock ring and repeat. Instead of stopping at 9-10 I go as high as 15-20in-Hg. I have never had edema build up.Session looks something like this
Total time at 5in-Hg = 20 minutes
Total time at 10in-Hg = 5 minutes
Total time at 15-20in-Hg = 2 minutes.After the final pump (30 minutes in including rests) I slip the ring back on and edge for awhile. I leave the ring on and kegel blood in regularly (20-30 kegel per minute).
Again without blisters, pain (some ball soreness if I don’t get a good seal), noticeable edema buildup, discoloration, thrombosed veins etc. My cock goes in hard as a rock and comes out hard as steel. I typically gain .25 inches in length and girth from my base erection stats.
Edit: I get edema build up when going max pressure in the bath mate but not in a regular air pump.
Supplement your pumping work with some extender and or hanging and or manual stretching work to force the length gains.
Also adding in a small amount of clamping will accelerate your girth gains.
The thing I like most about the pump is pumping before sex i get a longer and fatter cock to have sex with.