Onshape model:
https://cad.onshape.com/documents/6c72eb96eae109c4e6a20f9a/w/54eec85b32cf1de8af3d20ba/e/653f98a3a91ca070ed2c61d3?renderMode=0&uiState=65edd96511629276fdd494db
The author remixed this model.
Increased number of straps held to 12.
Decreased thickness of back plate to reduce material usage and print time.
Increased screw hole size to accommodate standard #8 wood screw