the answer to your ? is simple.
Yes, they always do.
Henceforth, I never carry my knives in kydex. I have a tactical kydex sheath from Greg Okuden that I had made for my Busse Nuclear Ice Pick a while back and I havent seen wear on the NIP.... Pretty odd now that I think about it... But either way, who cares, SR77 and INFI are not hurt in terms of strength when it comes to this... It is purely cosmetic as Andy Wayne once told me <img src="/ubbthreads/images/graemlins/smile.gif" alt="" />