Thanks Jim:

That is very interesting, and it is nice to know that others are experiencing the similar problem that I seemed to experienced in the muley mill.

I also kept spare commander heads ready to be employed as the need arose.

The one wood that I had the best luck with was wild apple wood that was well dried and cured, and that had grown in a thicket where it had to fight for its life.

The old timers told me that Rock elm was a favorite if it could be had. Around here the specae disappeared with the dutch elm disease about 40 years ago.

anyway thanks for the info maybe someone will make use of our experiences,