I currently have a Bird-Locked mini and I like it O.K. but there are issues with being able to pull out and burning on my testicles after wearing for more than a few hours. In many of the posts I have read it seems like the most frequently mentioned complaint is the ring and how to keep the testes from pulling or slipping out. This has happened to me on more than one occasion recently. The problem seems to be that if the ring is big enough to fit the testes through there is always the potential for them to slip/pull out - especially when things tend to "shrink up." The reason for posting in the Mature Metal section is that it seems that Mature Metal is receptive to customizing devices and innovation in design. I am wondering if, with careful engineering, a hinged ring could be developed which would allow for a smaller ring size to fit around the testes that would truly prevent them from pulling out. I've had some success with the Bird-Locked by using a basic hose clamp and being able to screw it down such that it is virtually impossible to pull out of the device. Still the problem is with the basic premise of the BL which is to spread the testes to prevent them from pulling out. Unfortunately this also results in chafing against my thighs and with the skin stretched tight it is more prone to damage. I am thinking that a high-quality hinged ring made out of aluminum or similar material, very smooth with very close tolerances to prevent any rough edges may be a solution to this problem. I am a finance guy not an engineer so I may be totally off base here and maybe there's already a device out there with a similar design that I have not yet found. Like many of the membersm my keyholder and I are looking to extend the time that I wear my device in inescapable but secure comfort. I would welcome the opportunity to work with Mature Metal or help in any way to explore this idea and perhaps develop a prototype. This is a great community!