I have modified the project to be able to use a larger variety of heat set inserts.
you can use from 4,2 till 5mm OD ( i have a lot of 4,5 and for sure I'm not the only one!
here you can find all the hardware you need to build this awesome heat set press!
The author remixed this model.
I have modified all the heat set insets to a smaller Out side Diameter from 5mm to 4,2 and you can use 4,5 4,6 and also 5mm