I have a steel tube style CB from steelpleasures.com Steel Pleasures. Unfortunately I find it unwearably agony after 20 minutes or so. This is because my scrotum gets wedged and pinched between the tube and the ring. Also the supplied padlock has sharp edges that dig in. After buying many, many padlocks I did find a couple that worked OK but this didn't solve the fundamental problem. Anyway... I still play with it from time to time, such as last night, and usually find it difficult and time consuming to get into. This is because whichever bollock is not already through the ring retreats inside my body. And lo! Last night I solved this problem in such a simple way. Before attempting to attach the ring I tied a bootlace tightly behind my bollocks so they couldn't run away. I used a slip knot, held closed with my fingers, rather than a real knot that might be difficult to undo once the ring was in place. The ring went on with no effort at all and off slipped the bootlace. Brilliant! The bastard thing was still agony half an hour later though Anyone got a slave with a tougher scrotum and want to buy a hardly used steel tube?