I see these online off and on and they make what looks like some very kewl doublenecks. Reviews I used to see where fairly good. Main thing I'm interested in from those who've played or own them, is how is the fretwork? Specifically are frets done well and with no fret bumps/edges feelable out and along side if fretboard? And what size frets, jumbo, medium, or thin. And hows overfit for contruction qaulity? Thank you. Thinking of getting one of the doublenecks as a possible project instrument.