I think I already saw this discussion .
Theory is interesting to try and move further, but practice with PE usually shows different results for different individuals.
Some have clamped everyday and didn’t gain, some did heavy girth work twice a week and gained . Lately two members are light clamping and edging for 30-60 min, and they’ve gained an awful lot. This is worth a try, but remember the most important of all things is to stay safe and not injure yourself.Also you’re not only working on the tunica and collagen when you clamp.