So...my $80 261...runs and cuts like a beast. Needed a tiny amount of carb adjustment, but after I put a 20" bar and chain on it she sure is a sweetheart. HOWEVER...the previous nutmeat owner (who had a HUGE bar on it, used drain oil for B&C oil, and said it wouldn't run anymore) managed to strip out the two of the three holes that the top cover screws into. My first instinct is a helicoil repair. Any thoughts on less drastic measures before I go that route?