CB Range discussion

I’ve read somewhere on this forum that all plastic & silicone CB devices won’t prevent masturbation. But looking at the pretty short and sturdy CB2000, I was wondering if this one allows masturbation as well like can be done with the CB3000 and CB6000(s). Compared to those two, the CB2000 is looking less ‘comfortable’ and (if I’ve read it right), the penis-opening is a tiny bit smaller as well, allowing most males not to gain a good erection anyway. Reason I’m asking is that (as posted a couple of times before) my CB3000 is about to break, and my wife was a bit pissed at me last weekend when I was in chastity and orgasmed while giving playing with her and she jerked a couple of times on my CB3000 (man, I was aroused there and really could not help it).