WCR did the back cut, cryo and micro-polish on my LT500 trans.  A couple of my gears had slight pitting but he said it was nothing to worry about.  So far, it shifts great and hasn't popped out of gear once. 

He also said, in his experience, gears that were ran with the "gear saver" oils showed more pitting than those ran with type f automatic transmission fluid or even motor oil.  He recommended type f.  That is what I have been using.