I don't have stacked foils - but very wide silver foil 1.25" by 8 thou' thick, so that's 0.01 sq inches which is about 9 AWG.
I just mummy wrap the individual foils with wide Teflon tape, put them back-to-back, and mummy wrap that with more Teflon tape. No connectors - just a bit of Origami at the ends and cut a notch with a pair of scissors.
99.99% pure silver.
No lack of bass weight here - Lamm ML 2.1 SETs into Coincident Super Eclipses.
Regards,