I just saw your contribution on Open Hardware, very nice!
So, I suppose you are perfectly capable of "reinventing the wheel" , however, I cannot help but wonder...
y_tho.jpg
(yeah, this is really old in tech years, but I post in the event someone stumbles upon this.) I actually tried the GPS suggestion. I was wrong about the error between two identical GPS's. It's quite large. Check out the other suggestion first.
