CB Range discussion

Hi there! My partner and I are relatively new to this setup and could use some guidance. We’re struggling with finding the right fit; specifically, his testicles turn blue whenever he gets an erection.

We’ve experimented with several rings and spacers. Most recently, we used the largest ring paired with the biggest spacer (we own True Rings 1, 2, and 3). With Ring 3, circulation was cut off even when he wasn’t erect. When using that large combination, he seemed comfortable initially until an erection occurred, at which point his testicles turned blue almost instantly. It looked to me like the ring was pulling up so high that it was crushing them (I know some pull is normal, but this felt excessive).

For both Ring 1 and Ring 2, I can easily slide my pinky finger underneath when he’s soft.

Another issue we’re facing is with his foreskin bunching up at the bottom. We’ve tried using a Q-tip to push it inside, but not enough gets in. I’ve read about the stocking method and gave it a try, but I haven’t quite mastered it yet. Does anyone have a video link they could share?