Mystery Synth - Reveal and Repair

The mystery synth that I picked up in my Mystery-Pickup-Video is finally revealed. Because I bought it as "defective", I needed to fix it. Which I did -- unexpectedly. Espen Kraft's Poly-61 video --    • Korg Poly-61 | A Raw and Beautiful Synth |...   Katsunori Ujiie's Poly-61 video --    • KORG POLY-61 Demo&Review [English Captions]   ----- Tumbleweed Joke --    • Tumbleweed Joke   #KorgPoly61 #SynthRepair #VintageSynth