Ollie on Twitter: "Oh boy...When it rains... Korg M1 for €100 Couple of broken button plastics and one micro switch to change . Nothing that can't be fixed https://t.co/Mf6t0XxfSM" / Twitter
Repairing my Korg M1 Buttons and Keys - Teardown - Part 1 - YouTube
Korg M1 Buttons | Keyboard Forums
Korg M1 buttons repair and full recapping - YouTube