Hello All I am currently in a cb6000s and although its comfortable we would like to move onto a metal device. When using the CB for long periods it doesnt allow my penis to breath and the cage can become unpleasant, of the two devices a BON4M small or the Master Extreme device which would anyone recommend? Ii like the fact there is no padlock with the master and Ii like the fact that the Bon is similar in design to the CB. Any responses will be appreciated.