UPDATE: There were a few small errors on the Top and Bottom. I have realigned the screw holes, changed all nut traps to 6.5mm across. There are three nut traps that are shallower than those that are extruded into a solid this is to retain strength. I suggest you use next M3 x 20mm screw for these three. I have also added counter bore holes to the top so that 16mm screw reaches and it is easier to Velcro electronics on top.
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