The "perfect" chastity belt

So after a while looking at other belts I noticed that some of them featured an anal-opening in the cables. I always found those very erotic. Being "exposed" and "usable" while staying locked in the belt at all times is a huge turn-on for me.  True, the cables can be parted and e.g. a Dildo could be used for pegging, but I imagine for a real dick it would be painful to go between tight cables. So I designed an anal opening that goes together with my belt. This is what I came up with and what Dietmar produced (after some more 3d designing and printing etc.) I tried to design the opening absolutely ergonomic. Meaning that it is not a "flat" opening, but the "flaps" on the side have an additional bend away from the body following the curve of your butt-cheeks. This way I thought it would be more comfortable to wear and could be worn closer to the body. The opening itself is nearly 5cm in diameter, so I imagine it is enough space for any dick or toy