Another layer of plastic definitely attenuates the signal. This is a good idea for stability purposes and also to remove an additional part from the assembly (the LNB holder). But in order for this to work, the LNB would need to stick out of the end of the box.
Yeah, that is an option. But I’m hoping for something that doesn’t appear too hacky. I know this case won’t be the most elegant of enclosures, but bolting parts on willy-nilly makes it a harder sell for non-hobbyists.
We’ve had it running inside of a clear, greenhouse-like container for months on end. 120F/50C operations were fine, but I can’t vouch for anything higher. No matter what the enclosure needs to be white or light grey.