For some reason, Fusion exported all of the Stl files on their side. They all need to be rotated 90 degrees before printing.
I printed him in parts with a 0.1 mm layer height on a Wanhao i3 Plus, using Cura. I used a 1.2mm will thickness for most parts, with 20% infill. The legs and key are printed almost solid to add strength.
Print the legs standing vertically with a brim, so they don't fall over mid-print. The vertical print is required to print accurate screw threads.
Print the key with the thread pointing up. You need a little bit of suport around the underside of the key, especially in the centre. No support is needed in the holes. You might need to print a second tall object next to the key thread unless you have very good cooling, or the thread may deform.
Print the lid upside-down, with no supports.
Print the body with the opening at the top, using supports only touching the build plate (no internal supports, and no screw thread supports). You don't need supports under the eye overhang. Block supports so they do not fill in the leg holes! I used a maximum overhang angle of 55 degrees.
I didn't include a fuse in his lid, as they do not print well. Instead, drill a small hole and thread some string through if you want a fuse.