Those machines are usually made out of aluminum and are really expensive. So i designed one that can be 3d printed. I tested with a PCB i made that had a USB-C 16 pin connector. And i managed to get it right. So I guess it works!!

It can support PCBS up to 10x10mm and its adjustable.

I printed everything in PLA, but i guess printing it in ABS or PETG would suffice.

Materials

8x M4 10mm screws (any) 10x M4 5mm allen flat head screws 7x M4 nut 3x M4 heat set Some silicon pads

Assembly guide

You'll get the 10mm screws and put them on the outer and middle holes of the left and right support (file named set-1.65mm.stl), put the as far as they go, maybe use some pliers or a a tool to screw them all the way in.

Then get the flat had and put in the two remaining holes.

Slide two nuts in each of the side holes, align the support holw with the nut and screw the allen screw on it.

Now screw 2 or 3 nuts in the middle hole and use the 5mm screw to put in place the vertical holders.

For the stencil holder, put the 3 M4 heatsets on it and use the remaining two 10mm screws as hinge to keep it in place. . Use the remaining 3 M4 5mm screws to put the top part in place.

Finally, add some silicon pads on the bottom to add some grip to it.