Henry: when I work with American Smoke Tree burl I find a lot of open eyes, checks, bark pockets, etc. I usually fill them all! I have even considered casting the blank in resin to fill the voids. I have seen wood that has been run through the stabilization process multiple time that is completely solid (all imperfections filled). The first I ever saw were the door handles on a Lockheed building. There process used a radiation source to polymerize the resin.
My experience goes back to knife making where the buffing compounds get in all the little imperfections and contaminates the final finish.
Beautiful call and piece of wood.
Fred