Here is John's letter about making these:
Hi Del,
  I thought I'd send you a picture of some Kolrosing pieces I created using your knife.  I purchased a kolrosing knife and instructional video from you and have really enjoyed putting it to use.  It's a beautiful tool that's a pleasure to use!  It makes it easier on the fingers than a straight knife blade, which I had started on.  I can really appreciate the quality and craftsmanship that went into this tool.  I love it.
.... Some of the designs are my own, and a few of them I started with carving outlines from the book 'Chip Carving & Relief Carving' by Josef Mader, and then added my flair.  My goal with all of these was to create a more 3D appearance using shading and hatching, much like pen and ink drawings.  I practiced using different filling materials such as ashes from a fire, cinnamon, ground birch leaves, and many spices from the cupboard, haha.  Some work better than others.  I would like to bring at least 3 colors into each piece I do.  I've done that fairly successfully with ashes, cinnamon, and powderized ground leaves.  Then I have to selectively rub in one color at a time and oil it.
  These are small round pictures that hang on the wall, however, one person did buy one from me to use as an ornament.  I created them to sell at a couple of pre-christmas craft sales I did in November and December.  I got the idea to do round designs from a couple of rosemaling books.  Many rosemaling patterns are done on round plates, and I had these little round 'wheels' already cut out, so they were perfect.
  Feel free to post any of these you feel are interesting and show off the Kolrosing art form.  I have a lot of fun doing it, so I expect I'll refine my own style even more as I go.
  I did use sanding sealer on all of the pieces and that is one really valuable tip I learned from the video, because without it, the cinnamon and ashes bleed with really soft wood like this.  And the sanding sealer makes the image much crisper looking with a clean background.  It might also help keep the wood together with the very fine cutting for shading.  On a couple of practice pieces I did have some wood pieces chip out so that was part of the learning process and I simplified my designs a little more and made sure I was holding the knife absolutely vertical for the fine cuts.....
Sincerely,
John Carlson