We left off yesterday with the back panel of the instrument clamped to the sides, and the bass resonator and keyboard support clamped to the front panel. After removing all these wooden clamps, we're going to work on sculpting the bass resonator into the right shape. The first thing we'll do is use a pattern to trace the contour of the curve with a pencil:
Then we'll use a small plane to begin sculpting the curve:
Once the basic shape is there, we'll begin to round the wood on the sides:
The resonator is starting to take form:
...and after some sanding, has its final shape: