This is the stackable module based system for sensors, antennas or just for storage. Its based on threaded connections. Main parts have inner and outer threads to connect to other parts, inner base plates, plugs and clamps.

The threaded parts must be printed with better layer resolution (im using the variable layer height about 0.16-0.20mm). If your filament is not dry (bubbles may occur), you will need to screw/unscrew the parts each other more times quickly to have smooth functionality. The clearance is 0.2mm for better water sealing.

There is no need for any supports here. Printable with 0.8mm nozzle too. The inner plugs will need customization to mount your own things in.

ANEMOMETER: im using CERAMIC bearing with outer diameter 10mm and inner diameter 3mm. The M3 bolt is plugged from inside the box to the top anemo part. THe word CERAMIC is criticall (it have 10x less drag comparing to standard bearing and have/need no internal lubrication).

UPDATE: Added internal plugs for anemometer sensing and the anemometer encoder plate. (2 different wall width and plug style)