Thanks Jim,
I only let the piece air dry in my shop for a week or so then cut the blank on the band saw, routed the mortise for the chuck and turned most of the wood out of the inside. Then I started my microwaving.  I find that medium thick CA glue works quite well at stopping cracks. I use it all the time on the lathe work as i run in to cracks or voids. Sometimes on bigger openings I press fine sawdust that matches in the hole then add the glue. On the sawdust plugs I usually hit it with thin CA first because it absorbs faster then add the medium CA immediately. The thin CA seems to wick the thinker stuff in.