It’s relatively easy to build a two-layer/double-stack WorkBench.

The basic approach is:

  1. Use a WorkBench 1007 Base or 1010 Base as the foundation for the stack.
  2. Use a WorkBench 1107W Base for the upper layer/s.
  3. Space them out using 8-32 hex (female-female) standoffs of an appropriate length for your project. You will need four.
  4. Attach the hex standoffs using 8-32 truss-head machine screws.  You will need eight.

Get detailed instructions from Ask Chris on this website.