@ Mizer, squeaks shouldn't be a problem, I am extremely hard of hearing. Hard to communicate without an aid in my hear-hole.
@ MuseumWood, Thanks for the warnings. The tree looks pretty straight on the outside. I guess I could start with two five foot section trying to split the lesser and if that fails take the better one to a mill.
As far as strength is concerned, I plan to go thick on the bench, maybe three inches and stagger the hind legs putting one about six inches ahead of the other with their insertion points just a few inches off center and angled out at ten or fifteen degrees.
As for the reactive juices, I could add a removable seating pad if needed. Thanks again. I'll update when I get one split. Might be a few weeks.