Thanks guys, really appreciate the input.
The Porsche book photo looks very early, possibly prototype, and interesting to note the car fitted with the smaller Whale Tail with no 'RS' sticker.
Also interesting to see a couple of press photos contradicting each other so maybe positioning did change back to the manual instructions later on?
Obviously I'm no graphic designer and a rather crude guess although I did trace the outline of the 'a' along with where I think the door edge would be on this Lord Hesketh photo which was no doubt taken early in his ownership when the car was relatively new. To my eyes the 'a' looks to be solely on the door and not overlapping onto the wing.....possibly anyway!
I think there's enough evidence to go either way and I'm leaning towards the 'a' not touching the wing which I guess I'm saying because that's the way I want to go.
Without more definitive proof that's what I'll do and I'll enjoy the banter when people tell me I did it wrong!
Cheers,