I have an AC 420 wheelset from about 2 y ago. i would like to replacethe bearings and overhaul the rear (it sounds grindy). However, I got as far as taking off the nut and taking out the axle end thing on the nondriveside. I am having trouble gettting the nondriveside cap off and pulling the axle out. Does anyone have any tips? I have the old style 15mm hub