Over budget 318 build

@Mopar Sam This is probably a dumb question, so laughing at it is ok! When using your ingenious fixture to file rings, using .030 as a round number to illustrate this question....do you set the fixture with a pair of .030 feeler gauges right off the bat and file only one side, or do you set it with .015, file one end, and then reset it .015 again, and flip it over to do the other end? With my limited knowledge, it would seem you need to do it the file both ends way to keep the ring round in the bore. Maybe I'm just over thinking it?