Tom Livernois from Oregon makes beautiful spinning wheels. Check out his website here. Here's a few pictures of Tom's Sweet 16 in action turning a "spinning wheel wheel".
You can see that the gap is removed and placed on the front of the headstock. Tom has the banjo positioned on the gap section and the tailstock extension (a standard accessory with the Sweet 16) is put into service supporting the work.
Tom finished this wheel for Deb and it is proudly used and displayed in our home.