For bedlogs on a Haven 12.5: Is it OK to use P. Heart or should I hold out for W. Oak? (found some 12/4s P. Heart at Edensaw). Also, should it be green, air dried or kiln dried? I figure this might be fairly important since the logs are 12/4 thick, ~ 4 feet long and they'll be sitting in the bilge. I'm mostly concerned about warping/shrinking/expansion/etc.