Found two interesting CB designs that seem to come from independent designers and are seemingly not a copy of any existing designs. The first one seems to be a 3D printed design similar to the steel constructions. It comes in 3 sizes right now and there's a "large" size in the planning. There are two types of materials: one that's a very smooth texture similar to the Holy Trainer line; another has a matte texture, but is good to keep things dry when you get sweaty. The tip of the cage is specially designed to help with urination. [Link to twitter post] The second one is some kind of steel custom fab, and the entire line seems to require a PA piercing to work. It looks really well made. There isn't a whole lot of information on the twitter account, and it isn't clear how to purchase this or even who can purchase this device. Invitation only perhaps? I'm not a fan of ball trap devices but damn this one looks really well made. [Link to twitter post]
Althea second looks more rigid chastity / steelworx hybrid. Like you say it looks well made. Interesting!