I'm going to try to either A) ride it like a bronco or B) place it on my knee. I tried the knee one in class, and it stayed on my knee but I was upside down. If all else fails I guess it is a belt for me.
You can make that work if you don't tip over but if you intend to become a "modern" instructor and teach according to the new open water standards then.... with all due respect, "pinned to the bottom like a hopeless noob in the hope that you don't tip over" isn't the route you want to go; it isn't what you want your students to see and it isn't teaching diving anno 2015. That's the paradigm we're trying to get past. None of that is where you want to be when you become an instructor so I would advise developing a philosophy about it earlier rather than later.
I don't like heavy belts either. A shop belt also took off the fingerprint on my right ring finger when it snapped shut with 12kg on it years ago. As for bad teeth.... seriously.... Buy a decent one. You're becoming a DM so one thing you need to be modeling to your students is that you buy only *functional* gear that works.The problem with a belt is that the dive shops tend to have old ones with bad teeth and I've lost a few of them or that they sit uncomfortably.
I figure if I am lucky enough to live on a little lake that is clear and shallow I should practice as much as I can so I can dive more while I am down south and train less. Although there may be a new learning curve once I get back in salt water.
Good luck. I know this might have sounded confrontational but I hope it jolts you into looking at the issue from a more open point of view.
R..