I haven't checked my mill gap lately but when I set it up it was .029". I typically only run the grain through once and get a fair amount of flour. The husks are intact (for the most part) with or without conditioning my grain. My efficiency stays pretty constant.
I have had a stuck sparge or two but I only recall them happening when I cranked the mill down to .025". that was just a bit too tight. I have more issues with rye malt than with wheat but that's a slow sparge, not a stuck sparge. I cause most of my own sparging problems.
Cleaning out the gutters last Saturday I thought about kilning the maple tree seeds. They had already sprouted. I'm not sure I could ever get that flavor out of my mill though and my wife was quite opposed to the idea.
As was said earlier, do what works for you. There are many paths to the same destination.
Paul