Replacing entire subfloor one piece at a time.

Needs a new roof badly. The new lighting layout will require new ceiling panels also. Planned on adding sheathing yes. Same 1/8" luan as the inside. The demo plan was to remove everything and start fresh. Next chance I'll have to get pictures will be next weekend (hopefully). Been extremely busy with work. Never done a total gut a rebuild before. Done a couple patch jobs before on a '04 prowler and that was a pain. Especially since fleetwood screwed the furniture from the outside in.