Chastity and orgasm denial discussion

Since this is my debut post… Hello all!:) For years, I’ve been going back and forth with the CB on and off. My girlfriend and KH (me) have played around with my chastity setup quite a bit. I still own that first gadget - it’s a CB6000. A few years ago, I swapped out the tube for the 6000s model. By “on and off,” I mean we use it for periods of time, then leave it in the drawer for intervals. Usually, I stay locked for several weeks at a stretch without any release. The longest stint was one full month. It felt like physical torture back then, but the device itself is quite comfortable. Things are getting interesting now… At the start of this month, she ordered me to put on my CB again. She said this time would be my longest yet: 24/7 locked with no release allowed. The last time I wore it for a whole month, keeping clean was tough but doable. Not knowing exactly how long she’ll keep me shut up now, I bought the MM Jail Bird to help out. Here’s my current dilemma regarding the A-ring size. With the CB6000, I used ring number 3. It felt good and didn’t cause issues while sleeping, though it slipped out relatively easily. So, I downsized to a smaller ring. During waking hours, it’s great—actually perfect. Tight yet comfortable. I can picture how hard it would be to pull it off, and I really can’t imagine pushing myself back into it… The real issue is nocturnal erections. Erections during the day are fine, especially when my girlfriend teases me (which she does often). But nighttime erections are a pain in the rear… or maybe more accurately, in the balls and lower belly. The ring gets incredibly tight, leaving little choice but to wait it out for about an hour before relief comes again. So here is my dilemma: Which ring should I pick for this new device that will be locked on me for a duration known only to her…