Thanks, Jerry. I'm sweating bullets trying to get back on track being I wiped out one years work on her. I've been trying to swing like a five day deal of just boat work, but it somehow backfired and now I'm the only one at the store today?!?

One thing I can say is 1/4" baltic birch is plenty strong for what I'm doing. The water tank will have 1/2" fore and aft bulkheads. But after the baffles get tabbed in I'd bet you could do it with 1/4" material no problem.