I wish companies would post schematics and things freely like Fender did. I was disappointed in the Maestro relaunch, I was hoping they would reissue the older stuff in more compact pedals but retain the high quality of the originals. Unfortunately that did not happen. I think they have the buying power now to get the parts manufactured again, they can afford to buy 100000 transistors and whatnot easily.
I've only ever owned three of the original Maestro pedals, the FZ-1, FZ-1S and the Envelop Modifier. Even back in the 80s they were rare and expensive. I bought a GGG board for the FSAH and all vintage parts, I'm going to build that soon as it's an awesome unique pedal.