Note: The photos are from an old version of the design; you will be making a simplified version.
Step 1: Materials and Tools
Piece of wood at least 22 millimeters thick
Piece of wood about 10 millimeters thick
15 millimeters dowel
5 millimeters dowel
Scroll saw blade with large teeth
Strong glue suitable to bond wood and metal together
Finish of your liking
And these tools:
15 millimeters drill bit
5 millimeters drill bit
Belt sander (Optional)
Step 2: Cutting and drilling
Drill a 15 millimeters hole centered on the X of the plans. Cut the out the parts and the slot in the sides with the jigsaw.