To be fair, Kurfurst's site is not exactly forcoming with truths either, for he also has an agenda, the 109 was the greastest fighter produced during WW2, and he has a very BIG hate on for Mike Williams and the Spitfire.
Mike can't win with Kurfurst as when he does make changes, Kurfurst still slanders him > Mike is dammed if he doesn't and dammed if he does.
There is much supposition in his 1.98ata K-4 article even leaving out the German notes questioning why 1.98 should be implimented even though the airframes were of such poor quality. He only shows that 1.98 was cleared for use, not that it ever was for the whole 'penny pocket' number of a/c he shows (maybe a handful were) > a mix of K-4s and G a/c, and only 56% operational.
In the 109E flight comparisons, it mentions that the Spits and Hurries flown were 2 pitch props though in fact when the Spit and Hurrie met the 109Es during BoB they were flying CSP props and using 100pn fuel.
Just to balance Kurfurst's rant.
