Self-locking bench dog for Festool MFT

A 19.9mm expandable bench dog that locks into place by tightening the m6 bolt going through it.
Once tightened, the dog won't be able to be removed from it's hole, so you can use it to anchor things like a clamp

You can easily adjust the top's height by "burying" it into the bed before slicing
eg: default height is 20mm, so you can move the model 8mm down on the z axis before slicing to get a 12mm top

Remixed from MyqM's great original design to directly use an m6 bolt/nut.
Easier and quicker to print, only one single part is needed.
The faceted sides inside will also keep the nut from twisting when tightening the bolt.

I also included a "screw cap" top that can be used for tightening
Just fit an M6 bolt inside the cap, and slide the m6 nut into the bench dog

Hardware BOM:
M6x35-60 bolt (length depends on the top's height)
M6 nut
Washer