So what your saying is that you have put a flat resurfaced flywheel in a KA and never had any problems like the clutch slipping, etc? Cant find the link now but i read that if the step aint there the clutch will slip and blah blah blah. IIRC the step should be 0.005". I honestly think that much little material makes no difference but if its there, its there for a reason.

fresh turned flywheel:


spare flywheel i have:


The one that just got resurfaced looked the same as the spare i have.