Hi Hurricane boy,
Firstly, I thank you for your reply, I meant as I said, I would like the chance to build an original Mustang, as was used by the RAF (before the USAAF got interested in them), whether it was powered by an Allison or a Roll Royce, but the idea of one of each would be even better.
secondly, while you are correct that the RAF had thought of buy the Curtiss p-40, and that the people who were asked to do it did say that they could design and build something better, they were still working to the specifications given by the procurement offices needs, which was obviously exceeded, but the original designation was give as Mustang, which was given before the first plane was being built, and it was given in honour of the fact that it was being built in the US, which means that it should be recognised as the original title, shouldn’t it?
Thirdly, I am fairly sure that your 1941 date is at least a year out, because, I am sure that the USAAF didn’t get interested until after the first conversions from the Allisons’s, to the Rolls Royce Merlin powered version, when the RAF made the Mustang X in mid to late 42, and while the USAAF were testing the Mustang X, it was the best part of a year, before they converted the B’s & C’s to use the Rolls Royce supercharged Merlin 66’s, which were then finally added to by the fully formed Mustang.
Fourthly, while I don’t have the total numbers of planes used by the British and the US, I do know that the RAF alone had 18 squadrons compared to the US’ 20 in the UK, but then there’s all of the other British Empire forces that used them in the Far East too, which I think would mean that your use of the US being “the major user”, something that is a close run thing, although, if you have the exact numbers used by both forces(US & RAF’s) then I am happy to learn.
And finally, I am grateful for your comprehensive reply, and I look forward to your response to my reply, especially if you are adding to my knowledge base, which is fairly limited, because I am not a scholar, I am just an avid reader, and watcher of documentaries.