True, but... for me, that means taking the grip off, messing with the selector detent/spring, etc... I may look at drilling the grip, if I can (have room without screwing up the grip itself) to gain access to the setscrew without removing the grip. This is on my pistol build, so it's not really that big of a deal. I just took it in, backed it out til I had no tightness in the takedown pin and left it at that.I understand what you're saying. One thing you could do is just back out the screw a tiny bit before taking it down, then screw it back in a bit when you re-assemble it. The thing that concerned me about the steel screw on mine is I believe it would have a tendency to "bite" in to the upper receiver lug, and over time that would probably cause some wear at the contact point on the upper. You won't ever have that problem with a nylon screw. Again, a great idea and thank you for mentioning it.
Glad to help!