Thanks for the response, Highstrung. She was evidently pulled from or withdrew from the site in your first link because it yields an error message.
Octave mandolin: interesting, I'd never heard of such a thing before. 21 - 1/2” scale length: between that of a mandolin and a mandocello. Very interesting sound: makes me think a little bit of the bouzoukis they sometimes use in traditional Irish music.
The FB is indeed a beautiful instrument but they sure don't give 'em away, do they? Yipes on that price! My wallet began whimpering as soon as I read it.
Sarah's vocal styling makes the lyrics a bit hard to decipher (at least, to my ancient ears) but, strangely, I find her voice so pleasing that I don't really care that much.