Bummer – no you can't use the BrakeAway with heated grips (not sure why). Other than that, it's probably the "safest" throttle lock for the F6B. But any throttle lock that doesn't lock your throttle completely should be considered safe. And I believe all of them allow you to turn the throttle grip both ways, with some sort of adjustable friction.
And yes, that's it on Wingstuff.