The reason to have A-model first is that though whole 1951 (when the most notable air combats happened) - A-model was the main type of Sabre used, and well - its cause we had to choose - as we cant do all at once. But - we will have latest A with J47-GE-13 engine (as with time most of A`s where upgraded to it by time we need) - and its the same engine which E`s had - so it gonna be mostly same in perforcfmance except improved elevator controls - but my bet - it wont make much sense - as we