RhythmMan_BluesRockFolk wrote:. . . about the nut and string guage . . .
I wouldn't be concerned about the nut wearing down. If it did, it'd probably just improve the action, anyway . . .
If the nut gets too low, you can put one or two slivers of paper under it to raise it back up.
When a string cuts a groove in a nut that is shaped for a heavier gauge, the string will catch and release when you try to tune it. You turn the key, but the string doesn't move. So you turn the key a little more, and the string jumps up in pitch - often higher than you wish. Very annoying. Plastic nuts are more easily cut than bone.