Edit: RKD does intend that the lowest portion of the dents at the edges of the armor be trimmed inward.
Original Quesiton: I think I know what you're talking about, and I was worried about those. You mean the most dented portions, where the armor is its lowest? I was going to grind those out, but looking through builds on here, it looks as those most people do not grind out that big of a portion, but just a slight bit of the edge. It looks as though RKD changed the dent from a one tiered dent, to a two tiered dent at some point. The builds where people have the first single tiered ab plate do not have any amount ground out. Maybe I'm just being too timid about it! I would be interested to know if RKD intends for that to be cut out of there, assuming we're talking about the same spots.