Just to refute your comments about "we have a big gun on the 410, see?!" -- the Me410 with the BK gun was a mass produced production run. It was sent out to units and flown en masse against bomber formations. It had jamming issues and over time, most of them were replaced with lesser caliber gun trays, but unlike the 110G with the 37mm, it persisted for some time and was actually intended to work. The problems were all with the gun jamming after the first few shots. The problems with the 37mm BK3,7 on the 110G are like the Mk103 gunpods on the Fw190. They were tested and found wanting. They directly hurt the performance of the craft to the point that it was dangerous to fly in that configuration and lost all combat effectiveness, and furthermore despite having a large number on the order only small numbers were built and the rest cancelled.
You're trying very hard to make something be relevant when it just... wasn't. It's barely a footnote in the history books. There's no question, no debate. The facts are what they are. They tried the gun, they hated it, they stopped trying it and cancelled that production run.
EDIT: And this is all derailing the topic, anyways. The topic was to re-sort the weapons loadouts for the current 110G in game to allow historically relevant loadouts widely used during the long operational history of this airframe. Its current loadouts limit the use of this plane in events and scenarios by locking in the gunpod with the main fuselage armaments. Separating them out would improve the situation, and adding a 4x MG and no-MG option would round out all the necessary loadouts.
Edit 2: FalkEins is not a forum, and I cited the book they were using and even the page.