Yes it is true that restricted length clamping while heated will probably compromise some length as the fibers contract. Consequently, would probably be wise to effect a full erection while heated to finish things off.
Some theorize that it’s better to achieve length first as generally the thicker the shift, the more load required to strain. Personally, I think that is primarily due to ineffective strain protocols. The physiological response that toughens the tissue against further strain is happening at the cellular level without regard to the total nominal load. With our protocol, we are reaching that desired strain at low loads, so additional girth prior to length treatment shouldn’t really matter. But if you use crude ineffective girth protocols that also induce cold longitudinal strain simultaneously, then this will prevent gains when you get around to length protocol.
The CS should generally be squishy even while erect. IMO, most of the girth gains reported on TP from clamping are actually just temporary swelling and edema in the CS and dermal layers because it is so difficult to effectively strain the transverse fibers and more importantly the pillars. As to why you don’t ejaculate… do you have prostate problems? Also too much masturbation with a weak pelvic floor could contribute.
I measure BPFSL inside the device during treatment.