Exciting news, hopefully the fuel tanks are easily removed (or magnetized) and replaced with empty racks or stowage bins. Some suggestions for your decal sheet would be the Inns of Court (well, any of the armoured car regiments attached/working with armoured divisions) and the 18th armoured car regiment 12th manitoba dragoons (especially relevant to the mk III)
I'll buy one of these for sure, if it was a Daimler I would have (and still will) bought three.
We are now officially in a race, you try and get this kit on the shelves, and I'll clear my paint que and get to carving up my resin blitzkrieg kit.