Interesting, I’ve always had great difficulties gaining lenght despite manual stretching, 3 months of hanging etch. Together with girth work as clamping/long jelq sessions etc. And have been wondering why my semi-erect was girthier but shorter than my full erect. This was several years ago, and after this long break, I have just started out PE again 1,5 months ago doing manuals (15 min effective basic stretching and 10 min jelqing) and using an extender/TLC tugger. I really feel like I had some good stretches the first few weeks, but my unit already feels less stretchy like it has already conditioned and can’t be stretched much.
Strangely, I gained 0,1-0,2 inch girth the first month but no length, and my girth is still larger semi erect. Would this and your theory suggest that I should then stop manual stretching completely to not condition further, and just do lots of low tension extending (8+ hours/day) + some jelqing? I really want the lenght now, and don’t mind waiting for more girth.