The main thing I took from his "apology" was that he over estimated the intelligence of the people he was talking to. In other words he made that old eletist mistake of thinking we were as smart as he is!!!
Don't mess with the holes in the recievers. Once you remove material from them it can't be replaced. It will probably wear in after enough use and takedown for maintenance, cleaning and such. If you just have to loosen it up polish the takedown pins a little at a time till you get to the point...