Compile fails with an error where a global TwoWire variable is declared, and that's as far as I got. Anything obvious/known that needs doing? I'll investigate in more detail (using the SD patch version) and post results, got to finish some other functionality and get a long-term test running before I can spend too much time integrating new cores and such.
It also took AGES to compile (estimated 5x with the previous core). Hopefully once the first compile is successful, subsequent ones will be less, otherwise it's going to make development on the Artemis that much less exciting. I did see an issue about this on Github but can't seem to find it again.