This looks truly superb Alan, and I can't tell you how gratifying it is to see the ITA interior assembled painted and weathered to such a high standard
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Of course the outside is equally well handled and personally I think you've got the weathering spot on. I can just imagine the crew, fresh back off exercise, attending to all the niggles and idiosyncrases of their churchill highlighted by the rigours of exercise
For my money, I'd leve the markings as they are. The Calgary Regiment had only just taken over their churchills at this point and the markings would have been pretty freshly painted
Chris