Good comments... I'm thinking of using the forward M-Lok slots for light/laser/QD mount, the rearward one(s) for pressure switch(es) and the one underneath for an angled grip. Will have to see how the placement works out once I get one...
Totally agree on the set screw interface ?. I was toying with the idea of using nylon-tipped set screws instead of the ones supplied to see if they might work better until I saw the offering from Mesa Tactical.
I've been waiting forever and a day for the AVA Tactical light mount and I've just given up at this point...