The reason they dont offer that option is because it contradicts the main idea behind the rest. The whisker biscuit eliminates the worry of fletching contact because all fletchings hit at the same time every shot. By trimming out three slots you pretty much ruined that aspect. Because of the design of the rest I can pretty much guarantee you that you' ll have fletching contact that you wont be able to get rid of by tuning now. Think about the odds of all three fletchings flying through there without at least one of them hitting the whiskers.