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Some people may have followed my odyssey in the DIY real grand action controller? thread. It started two years ago with me researching the possibilities of creating my own MIDI controller from a grand piano action and optical sensors measuring velocity at hammers, similar to Yamaha AvantGrand and Kawai Novus. From that thread you will see that I was rather unprepared for that, had to learn electronics almost from scratch, had to learn how to do piano action regulation. I also had to learn how to work with wood and metals, etc. I'm also a father of a 2.5 year old, a software developer with a permanent job, and on top of that I purchased a Yamaha N1X one year ago. So, expectedly I didn't have a lot of time for this project which is why it took me so much time. But ultimately I managed to finish it (well I need to make a cabinet now). Whoever is interested, can follow details in that other thread. No more words, here's the result: