Sounds great, Uli!
Next step: An XMLTools-based load/save gauge for the custom L: variables and station weights. It's not that complicated. I've got a template and all you need to look for is L: vars triggered by mouse rectangles and clickspots.
Other than that, I've got a load manager in my DC-9 mod that you can use. Needs adapting to the Falcon's payload station, fuel tank and door layout and a background bitmap, but not much else.