Another personal note regarding cylinder diameter selection:
Originally prior to the shot I had issues packing more than 3” up in my 2.25” diameter cylinder. This was before the shot. After the shot I was able to pack it up 4”+ on the day of the shot and at 5.5” high at 9 days post shot.
Regarding my use of the 2.5” cylinder: Pre shot it simply was impractical for manual pumping and I wouldn’t even try high pressure cycling as my seal of 2.5” was too little to prevent testicle sucking into the tube.
Post shot, on day 6 or 7, I started experimenting with it after purchasing a new LeLuv for the purpose. Initially I packed 4” and now pack 4.5” up in a cylinder width that was previously simply too large for me to ever use. Additionally, I run this cylinder solo and see the same temporary expansion of girth at tge mole midshaft post session with the same level of edema if I mirror my pressure patterns with the benefit of adding a little girth to the base and lower shaft comfortably. I have moved to using the 2.5” cylinder alone as it works reliably and comfortably if I start my sessions with an erection, which I almost always do.
My plan forward is simply to pack this 2.5” cylinder as far up as possible. It is both a dream and goal that should solve any aesthetic issues I have with my penis shape.