I've been working on this a bit today. It bothers me that the fuel gauge isn't quite right, in that it has one needle. When in reality, there were two needles, one each for the fore and aft tanks.
I remember that when Arneh worked on the MFD avionics update, he created a fuel page for the MFD and added realistic tanks. So I looked at his code, and sure enough, he's modeled the fuel flow from multiple tanks. Not just internal, but also external tanks on the wing stubs.
So, I'm going to try bringing that across and adding 2 fuel tanks to the KA-50.
But first I'll work on the remaining needles for the Clock and G meter as I should get them done quicker.