I'm looking to perform a ceramic bearing upgrade on my Dura-Ace 7801-sl wheelset. I am in the process of buying bearings and since they are loose balls and sort of pricey I don't wanna buy more than what I need. I know that the rear hub takes 3/16" loose balls and the front hub takes 1/4" loose balls. I am a little confused on the quantity at this point. Several differenet sites are giving me different numbers and I am confused. Is it 18, 20 or 22 loose balls in the front hub? Is it 18, 20 or 28 in the rear. Any help would be greatly appreciated and thanx in advance!