Yessir,
I'm still futzing with the design. I suspect that there's some slip in it. Good for overspeeded setups but I'd rather deal with that through other means (e.g. tall gears, with SE I can control the speed).
I'd think this car would never 'wheelie' or climb verts

with the diff.
That's why I'm interested in the tensioner in use in the Yokomo car.
Do you have a one of these diffs? I'd love to see how they work.
Brett