CB Range discussion

I spent two hours wrestling with a CB6000S in front of the mirror today. As I pushed my penis down to seat it into the upper part of the plastic ring containing the two lock pins, I pinched myself several times. The parts didn’t slide together easily at first, so I applied baby oil to their holes to help them fit more smoothly, which did make a difference. However, I still ended up bleeding from all the pinching while pushing down on the top half of the base ring and attaching the penis cage to the pins of the upper bracket. Skin kept getting caught between the pins; it was hard to avoid. Once I finally got it secured, I noticed my right testicle had retreated upward, causing the base ring to tilt sideways and forward across my scrotum. It seemed like it would slip off eventually. Essentially, that right testicle wasn’t trapped by the ring anymore but had moved up into my sack. The left one was held well, but not the right. I have a history of a retreating right testicle, which is why I chose a device with an open base ring instead of a solid one—it allows me to slip it on behind my balls. Does this mean I can’t wear a chastity device properly? Another issue is that my balls don’t hang low; there’s little separation between my scrotum and body, so the base ring has trouble gripping firmly compared to someone with lower hangers. Also, while the CB6000S includes four lock pins, CB-x only provided three spacers. Shouldn’t each pin size have its own spacer?