My mate came around today with two sets of these. They are the same as I have on the R90 racer so they are ....ahem "race proven"...well they didn't fall off or break. Made from stainless steel with aluminium shafts that go thru the motor. The rear one is undrilled as motor/gearbox would need to be fitted and aligned to suit, marked up and then drilled and tapped. What I like is that all the original engine covers still fit.I mocked it up on a spare r100 case so you get the idea.....any thoughts? marketable?