912 Bottom Mounting Hole Dimensions

I'm wondering if anyone has the dimensions for the mounting holes on the 912 engine where you would bed mount on the bottom of the engine? I'm looking for the center to center distance and bolt size on the mounting holes. I want to model some engine feet that can be 3D printed for say setting the engine on the floor or on a table. I'll probably print out of some kind of ABS or PETG-CF and maybe put Rubber Feet on them as well. These would obviously be in no way for operation of the engine. Thanks