The base was made for the work stand. John did not use the actual cabinet top as a pattern. The VS2 sits on top of the wood in the cabinet. You can see the outline of how the machine sits on the cabinet in the pictures below.
The hinge pins that go through the black lined holes closest to the opening can be seen at Leon's picture -
https://www.quiltingboard.com/attach...s2-hinge-b.bmp
Janey - Neat people never make the exciting discoveries I do.