awesome thanks its good to know those motors seem to be usable, will make things a bit easier.
Its a shame a single ragebridges wont cope in dual mode, that will add to the costs quite a bit, not surprised though, they seem more like feather sized controllers.
Ill have a look into using 3/8'' chain then, as seems like a good size. Whats the best way to tension chain correctly? would accurate motor placement be enough or would an adjustable idler of some sort work better?

And what's the shaft like on the scooter motors, is its a keyway with a threaded end? there's always a sprocket in the way so can't see whats theres to work with