Need assistance deciding on buying another Jailbird

Alright everyone, I recently caved and picked up a jailbird. I took plenty of measurements to nail down the fit, even using my old CB6000s as a guide, but it still wasn’t quite right. My main gripe is that it tends to slide down whenever I hang low enough; it drops so far that it rests on my testicles, getting close enough for them to slip out without me having to touch it. However, when worn high and tight, the snugness is excellent and feels very secure. Also, I think I got a cage slightly wider than necessary. My shaft usually sits off-center, always resting against one of the side bars. There’s roughly 1/4 inch of gap between my cock and the opposite wall of the cage when measured in that position. As for length, it’s mostly spot on; the tip is almost always touching the end cap. If I go with another cage next time, I might opt for a shorter one to keep things more compact under clothing. Thanks for taking the time to read my thread and appreciate any advice!