I have RPM front knuckles and the true track rear setup. I recently experienced the issue of the pivot balls popping out. I contacted RPM, they mentioned the ring mod. I saw pictures of them installed. I boiled them and tried it myself using ring from old broken Tekno hubs and couldn't get the rings to go on. Anyone able to find a video of how to get rings on? Also, what I.D. Size pipe do I need to get to get this to work?