Scalable enclosure, designed with Onshape, you can copy the Onshape document from here: https://cad.onshape.com/documents/85da4281f20b5f1cc576aa4b/w/b9cecc0d80f7a63a55674750/e/44fbf809fb69fa0bab9ffd6b

I wanted a sturdy waterproof enclosure that would be fully customizable to suit any size project, it's only limited by the size of your print bed. You should use the appropriate type of filament for the use case of the enclosure.

The size of the base and lid can be easily scaled using the variable table in the Onshape doc.

Nut recesses on the base are made for M4 nuts

Lid seal recess could be partly filled with an o-ring seal, silicon sealant or print your own using TPU, it is 2mm deep, compared to the lip on the base that is 1mm high

Try Onshape, it's a free CAD platform for makers, web based (no software to download/install), great functions and forum help.

Pics of printed parts show a scaled down version as proof of concept.

xxxx.stl and xxxx.3mf files attached here give external dimensions of base (LxWxD 80x100x30) and lid (LxWxD 80x100x10)

Check out my other designs at:

https://www.nexprint.com/U0028870948/home

If you think the design is ok, hit the like button. Or if you've got some improvement ideas, or anything else, leave it in the comments.

If you print it, leave a pic in the Makes, I'd like to see it.