There's been a few around. They didn't like much over the 200 HP mark though.I'd love to see more belt drives though ,think how easy track changes would be
I would LOVE a belt drive 15lbs weight savings at least, quick track changes, etc but your right I cannot live without reverse. If the belt drive dropped 150lbs from the sled then I may consider not having reverse LOL
Plus they seem to expensive but I am naive on the cost to produce custom gearing/belt.