The file 'Radiator Support 3D Printer Model' is (FCStd,stl) file type, size is 949.6KB.
This is simply a copy of the original design, but with a modified spacing between the radiator tubes, to be 19mm (instead of 20mm).
I have attached the FreeCAD file so you can modify it if necessary.
Radiator_Support_2.FCStd | 194.9KB | |
Radiator_Support_2.stl | 1.9MB |