http://robosynth.blogspot.com/
See the site for more. The following is just a snip on the Mark II Wind Controller. You’ll find samples on site.

“The circuit boards are housed in a wooden case made from cherry and walnut with some decorative inlays on the bottom part. The main body of the case was assembled as an octagonal assembly, but was rounded on the outside for that traditional instrument look and shape. There are three circuit board assemblies, the main board that has the processor and other active circuitry, an upper switch assembly for the fingering buttons, and a lower switch and LED assembly. The lower assembly connects to the main board before being inserted into the case. The upper switch assembly is also inserted into the case and connects to the bottom half sandwich with a small ribbon cable.”