I ruined a set of 69 disk spindles that way on my original Cougar. I used the reamer I had, which was the wrong taper and went a little too far on one side, ended up padding the nut out with lock washers (so I didn't make them unusable, just not so great). It was hokey, but it worked. Threw those spindles out not too long ago.Yeah, I am aware. Wonder if they make a taper reamer at the proper angle that could enlarge them? Or maybe my machine shop will have one.