FYSETC E4 Snap Case

Here is a snap-together case for the [FYSETC E4 board](https://www.aliexpress.com/item/1005001704076838.html) with the built-in antenna, since I couldn't find one. The top was designed to attach a 4010 fan on the outside. Also, take care when you're snapping the top on, as the tabs are a bit delicate. I put a couple holes in the bottom and included 2020 corner mounts, for attaching to a standard extrusion frame.

Bottom can be printed as-is, but you will need to flip the top over in your slicer so it prints upside-down. I printed the parts with a brim, just because that's more reliable on my printer.