Hey guys, just bought my first GJ acoustic - A 2009 Peter Zwinakis B-107. This is one of the funky sound port designs. Just couldn't resist as this one had an extra 'something' tonally.
I have yet to hear from Peter for exact confirmation but the back and sides are laminated rosewood and the sound board some kind of spruce. I think the neck is walnut. The sound port is quite cool and LOUD! I'm not sure if it's due to the port, however the overall sound is warmer but still retains good mid-range punch.
It's seen some use but I'll call it character 8) - definitely sounds like it's already opened up. I just can't put it down, my fingers ache from so much playing but I keep going back for more!
It's the feeling/comfort and sound I was after and I feel I got lucky with this one.
I have a fiberglass guardian case on the way from Michael as well as an oasis humidifier/hygrometer.