I edited the F3D file to make it actually parametric regarding the Vesa size.
STL's are for 75mm Vesa hole spacing, the F3D file is there for your editing pleasure and can be changed back to 100mm if you want.
The author remixed this model.
I edited the F3D file to make it actually parametric regarding the Vesa size, and some other small edits for printability and accuracy.