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That looks the biz Vic.
Yellow discs are gas warning patches, as far as I know.
It has not Vic. Our interior has had several coats of paint applied over the years and I could not find any evidence of the yellow disks. The pilot's seat back was replaced with a plywood piece to save weight. The Navigator's back rest remains steel as it has various controls bolted to the back of it but no yellow discs to my memory.That's a good theory, has it come up in the one your working on. The decal sheet has a number to be placed during the build so I'll be checking out both theory's.