I'm not the expert but I think if you mill these and then label, they might look meh. If you're milling chips that already have a recess, the likelihood that there's some overlap on the new recess with the old is high. The end result is gonna be a lot better to murder (manually remove the inlay) and then replace that inlay with a
@Gear label (or someone else). I think manual inlay replacement with Gear might be like $200 per rack which includes the price of the labels? You'd have to double check.