I bought one of these sight unseen, and of course un-played. It's pretty amazing BUT there are issues that a Rainsong rep at a NAMM show verified as part of why they quit making them. #1, they redesigned the tops from a linear graphite to the quilted style seen today. They decided there wasn't a big enough market to re-tool for basses. #2, intonation above 12th fret is OFF and he confirmed it was a manufacturing issue. Can't be fixed so keep your fingers lower than 12th fret. #3 - left it in a car that got hot - the glue on the neck softened a little and the neck pulled up a tad - still playable but was noticeable. He told me that was a known issue and they use better glue now. Also that there really was no solution for it. The bridge is not adjustable except for removing and sanding, but there isn't much to remove to make the action any lower.
OTOH - it does sound amazing. Acoustically it's louder than most regular guitars so for campfires etc it's great. I can't say the ones here have any of these issues as I've only ever played the one I have. Serial #75 made in Hawaii.