Pretty clever. I didn't realize they were out. I calibrated my Classic Instrument speedo using a Magellen GPS, and wondered then why a speedometer hadn't come out yet. (Maybe I need to get out more!
)
How close are the two of them? I'm sure this sounds sorta numb, but does the Sat. speedo slow down when you're going up or down a steep hill? It would seem, relatively speaking, the Sat unit wouldn't measure as much speed because it wouldn't sense the vertical aspect of the travel.
Good looking installation!