Summary
Skadis compatible pegboard & snap-fit hooks in 25mm and 55mm, designed for laser cutting in 3mm ply.
For reference, the holes are 5 x 15mm. Vertical repeat is 40mm, horizontal repeat is 20mm with alternate columns shifted down by 20mm.
The original spacers put the board 20mm from the wall, but 10mm should be plenty, or three of the spacer.dxf stacked. I tend to glue them to the back of the board.
The tube holders use bits of PVC overflow pipe (21.3mm dia).