I’ve got .2x30 mm nickel and the pack will only be run at 30 A for now and only 60 A at most ever. From Conductor Current Ratings [SRO] that should be fine as far as current capability. I don’t know that copper braid really helps the issues with the layout of the pack over wires. I was thinking I’d do triangular 3 cell groups to make the offset double stack, but routing series connections becomes slightly strange with that layout unless they’re connected just at the ends. If you have any examples of packs with a layout like that I’d love to see them, but I’ve yet to find any after some searching. Most things I find are very large flexible packs or bricks for on top of the board. My forum searching skills could just be failing me though.