I'm wandering off topic a bit, but I have a similar skewer-mounted system (pic below shows the light from Fall 2009). I've had it for two years; I love it, but I agree the shadow could be an issue. Two other possible disadvantages for such a low-mounted light are: 1) on a natural path MUT with small rollers, the low light casts the gullies in shadows; and 2) when encountering peds in the dark, it's possible that they might voice a complaint--something like, "You're light's too bright. People can't see. You gotta dim your light, man!" In such cases, at least with the system I have, it takes some extra care to reach down and flick the switch to low while watching the trail for other stuff, let alone not inadvertently hitting the human . . um . . yelling at you. Then reaching back down to flick it back to high to resume MUT cruising speed. Ugh, I really should be a better citizen and dim my light . . .