Does anybody know if the lock for the MM products is the same size as the one used on the CBXXXX line of products?
Yes, it's the same 20mm size. Because the lock sits sideways compared to a CB-X000, some may not be compatible.
FYI I took a Dremmel tool and honed down the edges of my lock with the grinding stone. It makes it much less painful when it pinches me. I highly recommend it. Picture below. http://www.chastitymansion.com/forum/index.php?/gallery/image/12215-honed-edges-on-lock/
I got a dremmel last Christmas, and haven't used it yet. Give me a chance to play with my tool before I won't be able to play with my tool any more. Thanks for the replies.