Rear feet suitable for the HP 8648 series RF signal generators that also serve as carry handles. These may be compatible with other test equipment, but I don't have access to them to test it with. The second and third pictures are taken to compare to an original injection molded foot.

Prusa

I3 MK3S

No

Yes

150um

20%

Print instrument side up and support from the bed to make sure the face the screw head will rest on prints flat.