I sent them an email and within a few hours Max both called and wrote back in an email. For a 6” build he recommends the K402 and noted that one user needed to modify the air intake to allow for more air flow.
Here are the examples he sent me:
https://www.instagram.com/p/CRPy90yjFEL/
https://www.instagram.com/p/CQgSWxpjzK4/
Does anyone else know of a source for doors? This is the biggest hurdle to building these from what I can tell. I don’t have a welder or metalworking experience and it would be nice to have a door kit with a window that I could build around. The others (casserole dish lids, scrap metal) people have made are certainly functional but I want something that’s also pleasing to look at. Plus I’d never convince the Mrs unless it looked presentable 😜