GECKO3 modules are about the size of a credit card - 85.50 mm long and 54 mm wide. Two 120-pin connectors are placed on one side of the board. To add extra mechanical stability, two pads with 2.5 mm holes are used which allow to use M 2,5 screws to fixate the whole stack of boards. Be sure to use spacers in the appropriate length between each pair of boards to prevent mechanical stress.

: Add real mechanical drawing with measures