What Colin Said.
Also
http://www.chiefdelphi.com/forums/at...8&d=1407293863
It looks like you have e-clip grooves on the outside of the bearing and also at the end of the shaft to retain the wheel. You will be better served to remove the interior groove because it creates a failure point in the shaft that's seeing a lot of torque. Use spacers to maintain the gap you like between the rail and the wheel and keep the e-clip on the very ends of the shaft.
Nice work.