I know of a few people who use BB mounted bash guards. The mtb world used to (and some still do) mount their chain guides and bash guards in-between their drive side bottom bracket cup and the frame. Has anyone done this in the trials world?
First time I seen it done was on Ali C's bike, where he mounted a Trial Tech half Ti guard, so that when he was riding switch foot, he still had coverage if he slipped onto his cranks & FW.
Advantages are, having the weight of a half guard and the coverage of a full one. I also think it looks pretty fly.
So if you have a BB mounted bash mod, post up a picture of your set up for us all to see.
I think there's a niche in the market for a 22 tooth bb mounted bash. Get on it someone!