Thanks for the info Ted!
Spindle is right at wheelchair eye level for me, and spooky enough getting the collet nut within .1" of the wood and wondering if my addition/subtraction skills had a "Hiccup",
BUT seeing the collet nut disappear under the work surface would be twice as bad!!!
BUT again, because of your deep carvings the last two Paper Birch logs were only surface on the back to a depth of 3"