Emmett
Thanks for the input
Regarding when the logs were trees, good point, and I don't know. It does raise the issue that if there is an option, older (dryer) logs may be a good choice.
And yes I would keep them out of direct sun, to avoid diferential drying if nothing else.
The kiln may not be an option and so this post to explore alternatives.
I think the thing I am seeking here is some input on the construction considerations of a home built kiln that insures the most even airflow.
J.E.B.