Thanks, Mark. I think that's what I will do.
So should I just change my file angle from ~ 30° to 10° when looking down from above (i.e., in "plan" view) but otherwise keep everything else the same as when I normally file chains (i.e., keep the file 90° to the bar when viewed from aft in "elevation" view) and use my normal 13/64" diameter files for standard 3/8" FC chain?
FWIW, this "Carmyra" 36" knockoff Alaskan mill I got off Amaz for $60 looks very good. I've never used one before, so I don't know much about them but so far I see nothing to gripe about.
That's it, or adjust the angle over time? Or just keep it at 30' for milling, I don't find the angle makes much difference.