I would be concerned that if you did this at full or peak erection, that you would generate tension that would lead to fiber width increases but not lengthening. Do you think you are generating enough longitudinal tension without being fully erect? I still think that the best possible tensions are generated when you start with your penis at less than full erection. Starting higher than this, you are stretching a poorly compliant tunica and tension-induced connective tissue remodeling will probably give you the thicker fibers that will “protect” the tunica against injury with future similar stresses. In other words, stronger not longer.
Your argument is reasonable; I was thinking (and doing) a sort of light massage, not really much pressure. I’ve heard about something similar, it’s called “trigger point therapy” - nothing related to PE, however, it’s used to distend fibrotic tissues formations (or something) in muscles.
I don’t do any PE-work with full erections : I always have had the believing that risks > benefits, when working with peak-erected penis, and your analyses are confirming that believing.
Be careful when working on your erected dick with your knuckles. Particularly sensitive areas are the top sides (blood vessels and nerves) and the underside (urethra). I know that you know that, it just comes to mind, for the sake of protecting curious newbies (and others).
I totally subscribe. Reminding risks is good to newbies, intermediates and even to vets - nobody is immune by dangers. Thank you.