I just bought this 1977 F112 off of Craigslist for $550. I'm surprised by its good condition, given it's age. It came with a nice, original case as well. I do not have much experience with 12 strings, and would very much appreciate feedback on improving the set-up. Net joint appears fine and untouched. The 6th string has 3mm at the 12th fret, and the 1st 2.5 mm. The fretboard could certainly be straighter; do most people adjust the truss rods pretty much until the fretboard is straight, just like an electric? There is a vertical crack in the nut, but I don't care unless I hear an issue. I assume upgrading all the bridge pins would be an improvement? It appears that there was once a pickup in the guitar, due to the replaced strap button. Does this button/jack give any hits what kind of pickup was once installed? What are the recommendations for pickups? I plan to use this guitar for recording, but would use mics for any higher end studio stuff. I don't see much of a hump behind the bridge, but note a small amount of space at the back of the bridge. Based on other posts, am I OK not to worry about this?