I want to buy a steelworxx chastity belt because I heard they're probably the best belts (or some of the best). I own a CB-6000, but I can't manage to wear it for more than 2-3 days, because after those days, my penis is a bit injured (cuts, little wounds), and also (sorry, I don't know how to explain perfectly) I think I have a large penis.. not long (15-16 cm erected) but surely large.. because when I close the cage, a part of the penis is compressed between the A-ring and the cage.. and in 2-3 days here we go with other little wounds caused by the plastic...
So I decided to spend a bit more and have a Steelworx, but I don't know what measures order

With the CB-6000 i always used the larger cockring (50mm) because with the other, when I had an erection, It was painful. Should I order a 50mm or a 47? And for the diameter of the cage? Maybe my problem with the CB suggest that I have to order the 44m diameter? I really don't know what to do.. let me make an example: if I measure my penis diameter.. and find that is ... X... I should order exactly X or a little bit more mm?
I sent an e-mail to Dietmar Posledni, but he hasn't answered me yet. Will he?
