Would love to replace the mirror/lens housing with something more like this

Does that seem plausible? Does anyone know of an enclosure like this made to fit the K40?

Not apparent what you want to gain with the enclosure but i did replace my mirror mounts.

Don's Laser Things: Improving the K40 Optics: Mirror #1 replacement
Don's Laser Things: Improving the K40 Optics: Mirror #2 Replacement

Very interesting, indeed. Thank you for that, as I was interested in looking into improving that as well.