Just to clarify, when i said “It is probably not necessary” to do a wire bypass on the copper spring, i meant most would probably not do it & it is a really tiny bit of possible extra performance to be had, BUT i am sure there is some to gain by doing it, and when you have gone all out to optimize the rest of the switch build for performance i would do it 
Check out djozz springs testing if you haven’t, for my reason for saying that.
IOS have 18awg silicon wire under components/gears in the shop.
And MTN has it also.
Just to be sure, because i am with you on the maths issue
When you say ~.44” you mean inches right? So that would be a square of ~11.2mm? that sound really small to me, much smaller than most other high performing switches besides the small 8x12mm omten switch. And very good news if i understand you right 