After I finished this, I did a search on the interenet, and interestingly found a previous thread I had posted here. It has a lot of background info from me, and a lot of thoughts, ideas, and suggestions on core ditches.
The name of the thread is:
"Need Opinions On Secondary Core Ditch."
http://forums.pondboss.com/ubbthreads.php?ubb=showflat&Number=233874Thanks!
Bill Lake