Thanks. It's very solid. I may have gone overboard. The front and sides are 8mm thick so I could make the removable grills 4mm so they wouldn't be too flimsy. I used PETG plus, but if I did it over I would probably use PLA. I was worried about strength, but PETG does not like to print flat at that size. I've had multiple failures, and as it is I still have a lot of sanding and filling to clean it up. It has taken a took of time as well. I bought a large format printer just for this and it just warned me that I should do a 500hr service.