I think the fast little He-100 is perhaps my FAVORITE aircraft, and (naturally) I have made, or will make, several derivatives. The He-112 was liked by many pilots over the Bf-109, and the follow-on He-100 and possible derivatives seemed to offer the Luftwaffe a promising aircraft in 1939. But...the Luftwaffe hierarchy was satisfied with the slower, shorter-legged Bf-109, and stuck to that, telling Ernst Heinkel to concentrate on bombers while Willy Messerschmitt developed fighters. But Ernst Heinkel worked on a lot of "unofficial" projects hoping to garner Luftwaffe interest. Lots of whif potential there.
The Soviets and Japanese bought examples of the He-100 to study or manufacture. Lots of whif potential
there.
My very next aircraft project will be two He-100's built simultaneously. One will be a real-world "stock" He-100D as used in German propaganda photos to fool the Allies into thinking that the Heinkel was in widespread use. The other will be an "improved" version, Argentine-built, for Japanese/German use in the Pacific aboard carriers!
My VERY FIRST whiffed aircraft was a "navalized" He-100, a rather raw, crude build (Lindberg, $.79 special, c. 1967?)-what I call a "paint and markings" whif--no structural alterations. Added a tailhook and slightly larger propeller/hub (Lindberg one very odd-looking, IMHO) and a custom camouflage unlike any "real" German aircraft:

I am going to "Phoenix" this, using SOME components of the original, but morphing it into something like this, using a slightly-cut-down Mustang tail and radiator, and FW-190 wing roots (IOW, MAJOR structural alterations, but keeping the "look"!) If you put your index finger horizontally covering the ventral scoop, it looks
JUST like a He-100!:

I built a "clean-sheet-of-paper, but based on the He-100"-developed "He-113" using the Japanese "Nanzan" with the built-in ventral scoop (engine cooling was always a problem with the original He-100--the "Mustang" version is one solution, here is another), He-280 wings, Mustang tail, "Jumo" engine, He-162 canopy (to keep things "Heinkel") and about 20% larger overall (the He-100 was a VERY SMALL aircraft!):

Here is a "comparison" between my "original" He-100 and my "He-113":

Long ago I did an "improved" He-100 with a Mustang-like belly scoop (narrowed), He-162 canopy, beefier landing gear, four-blade prop, and elliptical wings (cut-down Spit 22):

So you can see I am an ardent "fan" of the He-100!