@water_skier1 - No. Incorrect. Where the front and rear inserts attach on the boot are slots, yet they tighten down securely. Look at the picture I posted above, the front slot screws have a washer underneath and the rears (also slots) are the wider head Radar screws both tighten down just fine. You do not need countersunk holes to secure the boot correctly at all . Or listen to what @BraceMaker said above.
To use Mikro-just you are instructed (required) to get rid of the holes as it has to have a slot.