First submission!!! I'm only submitting for MechA this week bc TI scares me so hopefully this isn't too bad. I've pretty much convinced myself that 7 primary is min, but there's always a world in which 6 or lower is possible with some insane bonder/debonder setup, I'm just not willing to make myself go insane over it. Took a few layout changes (and a temporarily lost solution...) to get down to my current best secondary, and I can't find anything to go lower, I'll just have to see what the best solutions look like!