I really hope to see a layout of this one! It's considered 'rare' because a whole generation now craves the oldschool sound. Crazy prices for an MIJ on eBay.
The original Boss schematic looks a little crazyBut i found some 'boiled down' schematics
here and
hereUser 'Freppo' also did a great job finding modern substitutes for some of the outdated parts. He made a board layout which can be seen
here.
To be honest, i'm not sure if the board layout reflects all the changes that is discussed in the thread. Also i hope that the board could maybe be a little smaller.