Sounds good Andy, and I think I'd probably do the internals the same way. It only needs a hint of interior detail, and then only in those areas which can be seen. It's a good idea to leave the wood 'core' too, as it saves having to construct bracing and bulkheads etc, which aren't needed if the interior can't be seen anyway.
Looking forward to seeing it all come together mate - should be an impressive model. Wish I still had that 1/48th conversion kit (I think it was from Contrail?), as I'd do a civilian version.