The distinctions from the original model include:

• The bottom is hollowed out. This reduced the amount of filament (and thus weight) used by more than 30g-50g depending on the settings.
  • This enables 2 mounting holes on the underside, which increases stability to the mounting surface.
  • It also enables lowering the infill percentage, because all walls are closer and keeping/exceeding rigidity
• The width of the model is reduced from 10in to 9.88 inches
  • This allows the model to be printed on its side, and allows the layer lines to be in their strongest orientation
    • I was mildly concerned printing the model in either of the other two orientation, in case the weight of all the screwdrivers eventually failed along the layer lines.

Some extra geometry was added in the underside to ensure the models prints well even without supports, including all the holes.