Proprietary commands?

[patricktokeeffe]

I'm using this library with an Airmar 200WX weather station. (Thank you!) It doesn't transmit proprietary data sentences, but does have set/query commands. For example:

I started writing the code for these sentences and think I've realized it will probably require new sentence classes. Also, the manufacturer code needs to go 3 -> 4 characters. What else should be considered?