Here are some questions related to the recent thread on Double C/Double D tunings. I'm a novice interested in developing my skills for jamming, and I've taken minstrelmike's advice about working on chord backup to heart. I've been playing through many songs in three tunings: A, Amod, and Double D (ie, G, Gmod, and Double C, capo at 2) in order to get the chords under my fingers.
I've been working mostly with the I, IV, and V chords, but also VI (that would be Em in G, F#m in A), and of course the Amod chord in that tuning. These seem to work with the songs I've been working on--popular old time tunes, such as the top 20 list from the Old Time Jam website.
Here are my questions:
1) Are there other chords that I should get under my fingers to start with?
2) Are there other tunings that I will need at the beginning other than A, Amod, and DoubleD?
3) Are there commonly used closed position chords for Amod and DoubleD tuning, and if so, does anybody have a handy reference list? (I could probably try and figure this out, but I figure why re-invent the wheel when there is so much knowledge out there already..)
Thanks for any advice!