This is a kit loosely based on the R50iii that was a factory modified/upgraded R50 or R50e. The factory had the advantage of starting with new blank circuit boards which current R50 owners do not. Still, this expansion is pretty easy to install except for 3 wires that do need to be soldered by a steady hand.
MTG Kawai R50 3x
MTG Kawai R50 3x expansion board
I just picked one of these ROM switcher’s. If you have this machine, this should almost be mandatory. Super precise ,clear and easy to follow directions. The soldering was not that bad at all. I am really hoping we see a new lcd one of these days. 🙂 thank you so much.