This video goes with a fairly lengthy description which answers some of the points made by commentators on Facebook - the ones who didn't bother to read it! Setting the tuning scale ('laying the bearings') starts at 2 mins. 25 secs. in. The completed organ can be heard, here: kzbin.info/www/bejne/anW3m6BmZZ6afLc&ab_channel=CultureVannin