Some small lego blocks with extensions to hold the Raspeberry Pi pcb in place
The Pi board is exactly 56mm width (fits exactly within lego dimensions), so the first 2 of the lego blocks are the same, just bare lego blocks with a small extension.
For the other side of the pcb, we need some extra adjustments, since it is a little shorter than lego dimensions
1 lego block the extenstion start after an extra 1 mm ridge.
1 lego block the extentions starts after an extra 2 mm ridge.