Here are a few photos of the assembly. Teflon tape is slick and leaves a nice, clean finish on the silicone.

Note the thickness of the stinger tube......it is basically 3 layers of 2 oz cloth filled with Ultra Copper silicone seal, about .008" thick, weighs 2 1/2 grams. The key was wrapping the final assembly with teflon (thread tape) tightly enough to squeeze any excess out