Ok, came up with a super easy way to install those aggravating locking rings in a matter of seconds. You will need a 2 foot piece of 1 1/4" PVC sch 40 pvc pipe and a rubber mallet. Go ahead and install everything, axle, sprocket, brake hub, and lock nut. Slip one or both locking rings on the axle. Next slip the pvc pipe over the axle, press it firmly against one of the locking clips and hit the end of the pvc pipe with the mallet. The locking clip will be instantly driven in place and the pvc pipe will not mar the finish. Then do the other side the same way.