Hello Jon!
Your "BTW" above does not surprise me, an ADE for MSFS2020 will require a lot of programming from scratch - with all the unknowns of this new Sim.
But where could I help?
For doing research and backward engineering of the STK's intricacies you have - as I see - many helpers, much more experienced than me.
You may recall, that my proficiency was in testing all details of ADE before writing about it for laymen.
Concerning the new ADE2020, I am presently trying to find and follow its roots here in the forum.
The "Search"-function of the present FSDeveloper still confuses and sidetracks me

But I will be on line eventually.
An update of the (old) manual to your present ADE version (1.76 ?), which was lamented here is obviously still not part of your philosophy.
But maybe you have something up your sleeve ?
_________________
Helli