This is the Yokomo YR-4 II motor mount, 2 versions included. If you are familiar with my work you'll know I like to recreate things as accurately as possible but this doesnt always work out for 3D printing. These motor mounts are usually made of Aluminium (Aluminum to the Americans lol....) This means that although you can print them on a 3D printer, due to the small wall thickness it may not be any good for actual use. For this reason I have printed some and discovered a weak piece that consistently snapped off when shown a screw so I created a beefed up version at that point and have included that here too. If you have access to a CNC machine or can smelt aluminium parts then you can still use the original version, if not, you'll need to print the 'MOD' version.

Use the 'Convert to polyholes' setting on Orca slicer for best results replicating the holes accurately.