Any sheathing issues with the X will definitely be much more my fault than yours, due to the geometry of the blade. The forward weight distribution and re-curve both present challenges, but I like how it performs in actual use. Putting an efficient chopping blade into a snug fitting sheath always presents challenges, whether it's leather, nylon, or kydex. I thought you did a hell of a job sorting the kydex and making it work so well, but I'll probably still end up making a leather sheath for mine. just because I like the noise discipline of leather.
“A sane person to an insane society must appear insane.” ~Kurt Vonnegut