The original model has areas that are not joined. In the old model the cup and the pole attachment points were not connected to each other. I just opened the Fusion 360 File and extruded the ends into each other so the STL would be sliced as one connected piece. There are a little offset sections on the pole connections but they are tiny and not worth fixing.
Note: If the scale is wrong in your slicer scale it by 25.4x or 2,540%.