I really like the Heat press (99% 3d printed) by duck.knapp but it had a major flaw in my opinion:
you have to screw your soldering iron to the mount plate of the press, so the changing of the tool will take unnecessary long.

So i edited the mount plate and made a quick changing system.

so you can clip on different holfing mounts, which even should stay mounted on the tools (depending on your use case).

It is not the best looking system but it works.

I made different diameters for the holding clamps, from 15 to 19 cm.

you can even screw them for a tighter fit or chose a smaller diameter and clamp your tool in.

You will need at least

1 mountplate (you need only one, you can srew it permanently to the press)

1 clip

2 splints

1 holder with the desired inner diameter

i suggest to glue the clip and the holder with the splints.