via this auction
"To me this sounds better than most late 70s minimoogs Ive used and you can save 256 patches on this! This Source is the one you want and will save you a TON of headache in the future. This source has been serviced in 2021 by the best in the business right now, Rosen Sound, and sounds absolutely fantastic. The fine folks at Rosen sound rebuilt the power supply to help future proof the rest of the components and increase stability. They also installed a new Encore Midi which adds midi sync ability, midi in and out, and expands the memory 16 times the original, these are 325 new plus installation. Please research the encore midi system before purchasing. They also replaced the two light sensors for the control knob with NOS parts and calibrated to factory specs. These all will go and these parts are getting harder to find, like damn near impossible, and very hard to install/calibrate. It took Rosen Sound months to source these parts alone and they probably own the last remaining available for these. This control knob is now ready for another 30 years of use and this synth is impossible to control without it. As it is the membrane works perfectly but it also comes with a spare membrane panel from which is supposed to be the best replace panel available for when the membrane experiences problems in the future (they all go bad eventually). Parts and labor for all of this future proofing on a once very finicky synth was about 1500 dollars. If you buy a different source and want to keep it alive I would expect to pay the same in the near future."
