I also made a larger thermal exhaust port tile. The port is exactly the same as the first one I made, but it has a larger surrounding area with extensive panel lines. 40mm x 40mm.
A question about your Cricut Maker cutter - do you actually cut the .060" styrene on it? How do you do it? How many times do you have to repeat the cutting process? I have an older Silhouette Cameo and can barely cut .010". I have also been looking to upgrade to a Cameo 4+, which is supposed to be able to cut up to 3mm material, but I am skeptical.