Hanging lattice strip shelf

A shelf to hang under another shelf, using wood "lattice strips" from the hardware store.

These are "1½ inch Lattice" at my local hardware store.
Most of the pieces I get are <1.5 inch x <.250 inch thick. Some pieces are too big.
The holes for the wood strips are 40mm x 6.1mm (1.575 inch x .240 inch).
I included a .stl of the holes to test fit yours.

Make it as short or as long as you want. Longer shelves may need a bracket in the center to prevent drooping. Mount the shelves using the screwholes & then slide in the wood strips. If you put it in a cramped area, you may need to put a hole or a slot in the ends of some wood strips to allow screwdriver access.

9 different shelf pieces.
Curves or Hex pattern
short or tall (about 2.5 & 3.5 inch)
single or Double shelf
1, 3, or 4 wood strips

.3mm layers
20% infill
support in screw holes
Brim maybe
made with Tinkercad