I never knew vortex was out in 1993?
Anyway, montecs plane little to none. Its easy to spot a low planing BH. Less surface area, less planing. I was trying to BH tune my commander 2 years ago. and tried with Montec's and couldn't get any reaction with regard to POI with field points. So I put on some phantoms and steel force (high planing BH) and tuned it in, and still montecs hit with field points and grouped better.
But I had trouble getting the sharpness desired with montecs. I killed 3 deer with the same head. But I notice I didn't get the wound channel I wanted.
I moved to tricks and they plane more than G5's. Any 4 blade will.
Honestly I don't care if my heads plane or not if my bow is tuned and arrows spine matches that. One also needs to go thru their arrows and spine tune. I find 30% of arrows have inconsistent spines.
I want to try the shuttles. They look like quality head.