You guys msut have really selective hearing in regards to the K4, that long thread in the the other forum has stated the facts on this a couple of times.
-Less than the first dozen K4s had 20mm hubs installed at the factory, likely for a presentation or publicity stunt to some bigwigs. These were probabley replaced at the depot level before being issued to combat units, as no evidence of a K4 with a 20mm hub is known in combat or beyond first few produced at the factory.
-Some K4s were shipped from the factory to depots with 20mm gondies, and are well documented to having them immediatley removed. Again, no evidence of a K4 with 20mm gondies equiped is known in combat.
...OT: Want to really think about something amazing?... The K4 prominently being post-depot and field-unit modeled, but the 190A8 is factory-fresh and has disregarded anything beyond the factory dates into its modeling (options to exlude reinforced armor, the cowl MGs, or the upgraded "egg"/engine - all more common at various times in the field than not - but in HTCs defense it was a real mix-n-match, where the K4 is kinda standardised). Anywho, I'd personaly rather see an A-9, another mid and early A-series, and a few more F/Gs (and maybe another D) 190s before another late-war 109, but that is both my preference and thought on the most-lacking choices that would be nice additions to the planeset.