Load model into Prusa Slicer. For a MK3 set scale to 145% to better fill plate.
Modifications where done in Fusion 360. Original model had to many triangle to process. Used Prusa Slicer to combine 3 STL's. Saved plate as a single STL. Loaded STL into netfabb used print to generated a PNG. Used Adobe Express (free) to convert PNG to SVG. Loaded SVG into Fusion 360. Drilled holes and saved model as STEP so others could easily modify.
The author remixed this model.
Grouped ihavegerms bats into a single sheet. Converted to Step for easier modification. Unmodified group sheet is batroup. Modified hanging version with holes sheet is batgroup hanging.