One thing to remember when 3D printing, then machining that object to size...? Unless you're printing with 100% infill, you've got to be sure your perimeter walls are thick enough that you will still have a decent wall thickness after machining.? I believe that a lot of the strength in a 3D print is in the perimeter walls.? I vaguely remember somebody doing a video testing various wall thicknesses, but not who did it.
Don
