CO2 fire extinguisher and a jar of acetone. Enamel off the end in one go. Solder dip or crimp with haste and no flux (the acids erode over time, that's the advantage of a crimp air tight contact).
Cooner Braided Wire, stretch between the tow bars of 2 cars, one anchor and other the pull so as to braid it tight. At least as good as Litz once stretched.