As usual, great info in here

Quick question on front bearings as we're talking them and I pulled my N21R apart for the first time yesterday for an internals inspection :

How much slop is acceptable slop in a front bearing? When the crank is held by both the front and rear bearing on my N21R, I cannot move the crank at all, but when I pull the crank out and reverse it (ie have it held by the front bearing only) I can then tilt it a few degrees. Addtionally, there is a gap between the shield and the inner cage so i can see some light through it, but then again how big a gap is a bad gap compared to "functional" slop?

thanks,
Paul