I have designed an outdoor case for my Othernet Dreamcatcher v3.05, and am making it freely available for anyone to print for personal use.
https://www.thingiverse.com/thing:4463416
It was created in Tinkercad, and can be freely edited as needed by anyone, but can not legally be sold either in digital or printed form.
Nice work!
In my experience at least FDM (the hot plastic layering kind) of 3D printing is not great for water resistance. You have to print really hot with thin layers and still need to either paint and/or acetone fuse the outer shell. Raindrops have enough force to penetrate most FDM prints.
I like the clamp that will hold the coax. That is a nice touch. 