I have been working on an enclosure to hold an OnStep computer for the CGE Pro. I wanted ventilation for the stepper motor drivers and a clean design that will attach to the one empty side of the Pier Cylinder on the CGE Pro.
This is an initial drawing and i have a print testing on my CGE Pro now.
It is not water proof.. I don’t think you are really make any 3D print absolutely water proof, but any electronic board that is out in the elements I recommend and use a silicon conformal coating to protect it.