I race in the CTCRC and have done so for the last few years.

Both gearboxes were 2wd H-Pattern 6 speed dog boxes, and I've had the R&D one for the last three years. Its done standing starts for the last three years, and takes all of abuse thrown at it, whereas the Quaife went through two gear sets ! I've had the same issue with getting parts tho, as they never seem to have any stock, but there's no comparison in the quality compared to the Quaife unit. Oh, I'm running over 400bhp and loads of torque, so it has no issues handling this sort of power.

Jeff