so... I'm overhauling this old Suzue Promax hub, I don't like the bearing balls in them, pitted and really bad quality. The bearing balls that are in it are 5mm. I have new ceramic 3/16" laying around. So, my question is: Do you think the size difference would be a problem? do note that I plan to change all of them, and not just swap the ugly ones, so the size would be uniform.

5mm = .0196850394 inches
3/16" = 0.1875 inches

oh sorry.. obligitory "should I?": should I?