This is just a detailed set of build instructions plus stl files to create but inserts to hold the M4 and M6 nuts in the central extrusion. Finally a file for a soldering iron holder to suit a Weller WEP 70 iron using flexible filament.
The author remixed this model.
No drastic change to the model. https://www.printables.com/model/137817-threaded-insert-press-heat-set-insert-press