E3D Dual V6 Bracket with Individual Adjustable Heights

I am building a large format 3d printer and designed this dual E3D V6 hotend bracket. Each hotend sits in it's own movable bracket with a dovetail pin that mates with the main bracket. The dovetail joint allows it to be adjusted up and down a bit to true them up to prevent one from tearing the print. Each one has a screw to lock it in place. Each dovetail sub assembly has it's own cover.

These holes for the screws were sized for hot melt in threaded brass inserts from McMaster.com. The