Wanted to share an experience I had. I finally got out and bought my Mitty-Vac from AutoZone and pump cylinder from PetSmart (if you haven’t heard about this, do a search). I put a little electrical tape around the base of the pump. I bought the medium size cylinder (haven’t measured it yet). My base fits snug, and there is some room at the top. This is good to start with. My penis is thinner at the top.
I did not spend much more than $30 and this set up and it is great. I found I loose my vacuum seal around the adapters to fit the hose to the pump. I wrap the tube around the top of the pump (this pinches the tube a little bit) and seems to solve the vacuum loss problem. It is hard to describe this exactly.
I bought some metal rings from Lowes hardware store hoping to stretch out the testicles a little bit, but I have to lube to get one testicle in at a time (1 1/4” ring I believe), and once they are in they tend to slip out even when I dry them off. I need a ring that is smaller in diameter but will open and close so I do not have to worry about pushing the boys through. Don’t want to rupture anything! Ouch.
I have privacy issues but have been trying to manually stretch, jelq, pump whenever possible. Trying to keep a 2 on and 1 off schedule, and trying to fit this in my life so that it will be a daily routine. Something I can do and forget about without obsessing too much. Then after a few months I can measure and hopefully not be disappointed.