Sorry you didn't get any response sooner. I was hoping that someone else would have a more experienced answer that I do.
Burls can be very tricky to decide how to cut them up. Even when you think you have it figured out, you still might end up with a void that ruins your blank. Sidewalk chalk and some circle templates are my friends when I am cutting up stuff.
Where are you at? With more and more daylight now, I might be able to swing by after work some time.
