Quote:
Originally Posted by Jeff in Pa
Make sure the allen / hex wrench has fresh corners. Grind the end if necessary to get good edges. ( do not get it hot or you will lose the temper )
I find KROIL works better than PB Blaster. A 50/50 mix of acetone and ATF works just as good as KROIL too.
If it is stripped, use a "F" drill ( .257 ) to make a spot on the top set screw. Just go far enough to get full diameter . Change to a 13/64" or 3/16" drill and SLOWLY drill thru the set screws. Use oil take your time. If the drill bit gets dull, resharpen or use a new/fresh on.
Once thru, use the 13/64 " thru the hole and then use a 1/4-20 NC tap to clean the threads. Purchase all new set screws when you reassemble.
I've already had my fun with stripped set screws 
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Got it off :-) Pretty much as you explained. The only difference was that I had some left handed drill bits that I used just for stuff like this. I was also lucky enough to get just the first screw out without damaging the one behind it. That second one I just unscrewed normally. Thank you.