This won't help with the ballcups popping off (I know many have had issues, but we never have, even with the old ones), but I had the same adjusting issue when I built the 210. I took an 1/8 drill bit and bored the end of the ballcup roughly 3/16 deep to allow the shank of the link to not bind when it goes into the cup. You could also just shorten the ballcups by the same amount. As with any camber link assembly, use some type of lubricant- beeswax, chap stick, or black grease on the threads. I always use a drill to work the link in and out of the cups a few times before I assemble them for good.