I just happened to have a very nice Holly log that Mark Baker gave me about four years ago and he said he had it about ten years so it was absolutly dry.
Because it had been drying for a long time it was as hard as flint so I thought this would be ideal to satisfy both criteria.
As you can see the log has loads of knots and they are as hard as bullets.
This is what Dave started with
The blank is mounted in 4" gripper jaws ready to be hollowed with the Crown Revolution after drilling with a 2" forsener bit
They end result is a very nice vase that has been waterproofed with two coats of Treetex
Because of the hardness of the wood this was far from easy for Dave and I think this is a great result