Angboy:
The workmanship is outstanding. You say you might not make another. If you do, and have more antler, try this:
Using a piece of antler about 5/8 of an inch in diameter (if you have it) fit and shape it to leave as much of the outer texture of the antler on the blank.
I am not familiar with cariboo antler, but it appears that you might have gotten down into the marrow, which, in my opinion, is to porous to work all that good.
For years, I made knives, using stag and antler for the handle material.
I, along with other knifemakers, left as much of the outside texture on as possible.
On another post, I posted a picture of a knife I made, using stag. Do a search and you will see what I mean by leaving the outside on.
Another opinion of mine is, the only reason to use antler is to leave enough of the original texture on it to identify it as antler. If the outside is removed, all you have left is a piece of porous and varied colored and very unatractive material that could be anything.
There is one exception, though. If you have a piece of antler that is white and large enough that you can turn the outside off without getting into the marrow, it makes a beautiful pen. It looks almost like ivory.
The above is not intended to be a slight on your work. What I wrote is based on many years of personal experience with antler, and the intention was to be helpful.
Bonefish