I had been pumping at 2-3”Hg since last year; higher vacuum stretched the scars painfully. A couple of weeks ago I decided to man up and stepped it up to 4”, sometimes 5”. After the first couple of days the scars stretched and the pain level not only dropped below the usual, but parts of the scarred area feel normal. I can rub or even edge over them with no discomfort.
So, maybe they’d just stretched as far as they’d go, and needed some more cowbell.
The other interesting thing is that I’m not getting any edema at 5”, even with one-hour sessions. I’ve racked up over 500 hours in the tube in the last year, and I guess my shaft has gotten used to it.
For the last few weeks I’ve been using the heating pad. I’ve settled into a routine; 30 minutes with the Mityvac at 5” with the heating pad, 30 minutes cooldown with the tube and the breast pump at 2” or so, then usually the Size Doctor extender.
The extender still floats on the fat pad, but I’ve moved from no extension bars to 40mm. I can use 45mm, but that comes close to bottoming out the springs and I don’t want to risk another blister. I don’t think I’ve gained any length, it’s just the extender pressing deeper into the fat pad. I don’t know how much vacuum the SD bell is pulling, but from effects on my glans it’s a lot more than the tube. I’m mostly acclimated to that - it takes two or more hours to get the “walnut fissures” now - but the usual wear limit is discomfort from the base, mostly from the balls on the open end of the yoke shape. Looks like I’m going to have to cobble up some padding like some of the other extender users have suggested.