Yeh, K50 and T50 are completely different.
The next question I have is, whats the best way to set up the clutch? At the moment it has the 20V flywheel and pressure plate, with the K50 clutch plate, it was done like this because the 20V has 2 more bolt holes on crank (6 vs 8?) for flywheel then the 3AU, and because 20V cluth plate wont fit on K50 input spline, the problem is the clutch plate is much smaller then the 20V one, so it kinda only has half of its area contacting, the inner part of the plate is over the recess in the 20V flywheel, and I dont think it will last to well? Is there an easy way to do this better? Had planned to machine 20V flywheel and put the original K50 pressure plate on it, by way of redrilling the correct PCD into it, so would end up with 20V flywheel, and K50 clutch and pressure plate.