The whole trick is that to make the EVO pilot
work (or
work well if you want) the most important is PGN 126208, which is the general "I can transfer pretty much anything" PGN. Similar for other vendors.
This makes the autopilots a prime example of devices that most benefit from implementation in a
plugin with architecture similar to the
current radar plugin (= one implementation of the underlying shared stuff reasonable extendable for the different products).
Better architecture than trying to do this in the
OpenCPN core and sure much faster to yield usable results.