Re: When chording OM or Dolas?
Agree w/Shaun. If you like the "big" open-string sound, two- and three-finger chords and frequent capo use are recommended. If you like the less-ringy, closed chord sound, or if you're doing a lot of "sock" rhythm, playing fast changes, or frequent modulations (key changes), learning and using barre chords makes more sense.
I'm definitely in the former camp, and use open (or capoed but unfretted) strings whenever the music permits. Simpler the better, for me anyway.
Gibsn: '54 F5 3pt F2 A-N Custm K1 m'cello
Natl Triolian Dobro mando
Victoria b-back Merrill alumnm b-back
Stradolin Vega banjolin
Sobell'dola Washburn b-back'dola
Eastmn: 615'dola 805 m'cello
Flatiron 3K OM