RE: Very sloppy steering in Lightning VX!! Help!!
Well of coarse you have to be careful when reaming the cups. I did it on mine and have never had issues with them popping off. The steering was ultra tight on mine so it did not return from either direction. Reaming the cups was the only fix I could think of.
PS: Do check the servo saver first, it should come set from the factory but you never know. From the way you describe the issue it sounds more like tight linkages.
-Derek