Great work there Sonni,
OK not criticism because the work is outstanding
but........
As the tool is meant to be a one tool option maybe some form of pocket or loop for a firesteel ( and your firesteels with a mosaic would set it off perfectly) and some way of attaching some form of sharpening device (either small pouch for a DC or GB file?) maybe on the back so it does not take away the aesthetics of your artistry, those are the only things that could be missing at all and that is far as I think I could possibly add.
Your workmanship is outstanding and practical with a perfect finish ( I know I have some of your work in front of me as I type )