I was given many files needed for the device to be built, I can share them with people here, one of the guys here sent them to me, but they had no instructions, my not going ahead is that you need Microsoft Visio to get the finger markers to work, and Visio has a 30 day trial which I don't want to waste. I can email the files to anyone as I believe it has everything needed except instructions on how to build it.
Two years ago the price was about 500 Euros for the parts, maybe cheaper now.
Maybe who wants to build one, maybe we can work together on a forum or something that we can all work together, as I have every email sent on this board for the last few years, questions and answers.