KB 107 top ring gap

yes, file them inward not outward, as in...NOT toward the outside of the ring face.

this usually applies to moly rings, i do it with all regardless.

files are more forgiving.imo...the crank type filer can really remove a lot and if ur not carefull...you'll have a .060 gap.lol

and very lightly 'with fine file' just glance all edges of the filed portion once over.

btw...i grew up reading bill the cat and opus from the outland/bloom county comic.