So I've been running these profile cranks for awhile and noticed that they are wobbly on the spindle. I tighten the nut down hard but it doesn't help. If I add another spacer it seems like it would make the problem worse? I was never really perfectly sure on setting these things up from the getgo as far as spacer and having it squeezing the bearing if not spaced right and so forth. The cranks spin fine but one arm definitely wobbles.