Im kind of late to the party. But I just picked up a TM 80% ar15 lower and one of their uppers. Machined the lower and found a .015 to .020 gap, no where near your 1/16", damn! I ended up machining my own over sized take down pins and re boring both pin holes. I dont think you would be able to take out .060 worth of gap without breaking out, but it might be worth looking into if it bothers you that much. I guess I cant really complain about my gap because I got the upper and lower for like $75.