Mine actually locks up in certain positions so there may still be some crud in the joint that I need to get out. I'll definitely keep it no matter what because the inner joint is completely fine so if it comes down to it I can at least use the parts of the inner joint to rebuild another joint if it ever comes to that. Heck, even rolling on a clacking CV would be fine as a last resort if anything catastrophic happened out in the hinterlands.
Cheese cloth is a great idea Rowhard, but with the joint completely assembled (and no way to take it apart) it would be tough to get the cheese cloth in there to check for rough spots. I may give it a try anyway.
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong, it usually turns out to be impossible to get at or repair."
-Douglas Adams, Mostly Harmless