3d Printed watch crystall press

This is a press to fit acrylic crystall on watch cases. A whatchmaker crystall press can cost over $200, so this is a cheap and working solution for hobby enthusiast.
You will need a knob with a M10 rod of 12cm, I used one from a monitor stand, that has a thread for a M4 screw on the opposite end of the knob where it fits a ball bearing of 13mm outside diameter, 6mm inside diameter and 5mm thick, a M4 x 8mm long screw and a M10 nut.
If you do not have or can't get that threaded knob, you can use a M10 rod, but you will need to drill and tap a M4 thread on one side and file the rod to 6mm to fit the bearing. Then you can use another nut and print a pastic knob for the other end.
There is no need for support material, the press body should be printed on one side, for strength.
You can add a magnet to the ram and a piece of metal to the crystall dies so it does not fall.
All parts should be tight fit, some sort of filing or sanding may be required. I had to sand the M10 nut that goes