I have the hydromax 5, with the vin mod (google it, there are diy out there).

Started 2020 at around 4.5”/4.8” bpel and 5.5” girth. Flaccid was like a nub in my mind (never measured in the beginning).

Currently 03/2023 hit my goal of 5.5” bpel, girth is 5.5” or 6” after pumping (not trying to increase that part).

First bought the hydromax and I did the manual pressing bellows down in a bath 3/5mins for the first 6 months, didn’t notice any change, maybe some eq progress. So I googled bathmate mods…

Then I started adding more pressure and worked but got a lot of edema, but got to 5” bpel after a year or so. Pump to max (my comfort level more, no pressure measurement). For all 3 session x2/day. After that I kind of hit a plateau.

Added other PE devices, vacuum hanging, totalman hanger etc… probably helped but with vacuum hanging, came blisters. Another story.

New routine with bathmate: 2 sessions (1 shower in morning, another at night (15 mins per shower).

First session, warm up. add bath salts to water in bathmate, wait for salts to desolve. Wash and warm up penis, apply some type of lube (mainly coconut oil and some shea butter mix). Get a good erection, and start pumping. I start with minimum (your own comfort level, for me I pump (using the mod) to when the bellows are fully collapsed. Brush my teeth, (2-3 mins). Then add a little more pressure using the mod(small increment, maybe a centimeter or so. You should see it move to your next comfort level) Brush my tongue, maybe another min or so. And repeat last step, for a min or so. Release pressure and relax for 1-2 mins.

2nd session, bath salt optional. Get a good erection using your lube and pump. You should notice you can add more pressure on the second session. Pump until you reach your last size/pressure. Shampoo hair and face. You should be able to add more pressure, again your comfort level. Do a body wash etc, and add a little more pressure for 1-2 mins and release.

If all goes well you will get minor edema but not straining your junk. If you’re getting a huge amount of edema, listen to your penis.

I hate bathmate charges so much for the extreme! Vin vac mod is way cheaper!