Chastity device reviews discussion

I’m completely fresh to this lifestyle. My wife is on board and eager as well, but our current setup has some issues. Mostly, my testicles get squished until it hurts after a while wearing it. I can’t tell if the culprit is the provided rings being too small (even the largest one feels tight) or if the sheath just hangs down too low and close to the body. I’m seeking recommendations for a device that: 1. Stays light enough for long-term wear, 2. Offers plenty of room for the testicles to drop naturally, and 3. Fits snugly against the body without being so tight that it stands out under clothes. Thanks in advance! The attached photo shows what I’m currently using.