via this auction
"First, the synth was given a thorough cleaning inside and out. Among other things, this included removing all of the infamous black goo from the top PCB caused by deteriorated foam dust cover. The plastic side panels and control surface were carefully cleaned using specially selected products. Finally, the keyboard was completely taken apart and each key was washed, individually and by hand.Second, all of the slide pots and switches were replaced using new parts of the correct value. I purchased a kit bought from Technology Transplant, which is one of the few companies that still sells restoration kits for the MG-1. As a part of this sale, you will also receive a set of brand-new, never-used slider tips and knobs, which came with the Technology Transplant kit. (The knobs and tips on the instrument are all original, as far as I can tell, and are in great shape still.)
Finally, the MG-1 was taken to a professional synth technician (Dean of Five Star Engineering in Mesa, Arizona), for all remaining electronics work. Dean repaired the out-of-spec power-supply circuit by replacing a defective voltage regulator; repaired the keyboard-current circuit by replacing a defective integrated circuit; replaced the defective LED; cleaned the key contacts; and finally, performed a full calibration of the instrument.
In short, this MG-1 is clean and sounds great, exactly as it was designed to. You would be hard-pressed to find a cleaner, better-sounding MG-1!"
