Red,I just read your pdf file on constrictors and looked at swm's demo pics.
I have been using "island rings"from the local adult shop to do the same thing.Bad thing is they are small and weak and break i buy three packs at a time(theyre cheap).I am goin out tommorow and getting the cable clamp.I have always let up the pressure when my unit gets cold never turned black,and I have found I can keep it on longer and longer.I have gained .5" of girth 4.5" to 5.also gained 1"length since june 2003.This constriction should also stretch the tunica I think.I was reading one of supras posts about extended erection times causing ballooning and constriction would also cause this ballooning.What do you think?