No problem Darryl, and good info.
Re the mounting of the controller Darryl - if you remember some of the photos I sent you some years back, scanned from 'Spitfire in Blue', there was an external shot of the port side of the cockpit and wing root, which showed the rivet or bolt heads, on the outer skin, which held the controller in place. This should indicate its position in the cockpit. From what I remember, it may have been closer to the entry hatch, and not where I previously described, above the throttle, which, I'm sure would not only be extremely awkward, but would almost certainly interfere with the operation of the the throttle.
I'm a bit 'woozy' with yet another bl**dy cold at the moment, but, if I can find the strength to lift books of the bottom shelf (!), I'll have a look through my PR Spit references, as I'm fairly sure there's a factory drawing or two, showing the mounting positions for various type/Marks.