Kepler Stingray X, copper inner SS exterior, one piece tube, very snug threads and a floating silver plated 510 pin. Lowest voltage drop of any of my mods by far. Pretty as hell too.
With a 0.33 ohm load, the difference between the floating pin and the hybrid was only 0.03 volts which negligible, the floating pin is also safer.
With a 0.33 ohm load, the difference between the floating pin and the hybrid was only 0.03 volts which negligible, the floating pin is also safer.