I'm not very familiar with all planes in LoMAC or the lua interface (my cockpit is now in the pile-of-plywood -phase), but maybe it would be useful to compile a list of features to implement. I'll start with a few, help me out by figuring out more.
Information for my instruments:
-selected weapon type
-ripple quantity
-ripple interval
-delivery mode (single, pairs etc.)
-number remaining
-hardpoint information (this I haven't though carefully yet, maybe even enough info to build replicas of A-10 / Su-25 instruments)
There must be some others I've left out