As a part of MPCNC Z-Axis assembly, you have to drill in holes for nut traps and ultimately tool holder assembly. I did not have a reliable way of holding the tube still while drilling, so I came up with this - you can screw it somewhere to be held still.
Clamp holding pipe is held with M8x40 socket screw
I drilled it down to plywood sheet using 4.8x19mm wood screw - hole should fit any M5 screw. Plastic in these small legs tends to break, so use a washer if your screw head is not flat
Hope it will be useful for someone else than me ;-)
The author hasn't provided the model origin yet.