Thanks to all for the kind words.
At least half the credit for this project goes to a friend of mine, a master woodworker and electronics savant. He was an instrument maker (guitars and harpsichords) who once made a guitar for Julian Bream (a familiar name to our UK members, I bet). He provided the woodworking and electronics expertise while I provided the design and some labor.
Typically, we worked on this project one morning a week. It took almost a year to complete.
The wood was provided by a local hardwoods supplier that owns its own sources of wood in Belize. The board I used was inch-thick stock and cost about $60 USD.
To answer some questions...
GordonC - I did not like Moog's use of bathroom plumbing hardware for the antennas. In my instrument I used brass tubing with smaller rings soldered therein to provide stops for the insertion of the antennas. The antennas simply slip into the tubes. This makes their removal easy but provides a secure fit. A machine screw is tapped from the inside of the case into the brass tube for the pitch antenna, making electronic contact. The wooden pitch antenna housing, by the way, took a day to make.
Senkun - the pitch preview PCB was supplied by Mark Keppinger. I don't know if he has any left. I, however, have a slightly-used Moog case for which I have no use.
coalport - I beg to differ, but my theremin looks just like a Bessarabian whore (God bless her!) I once knew.