Simple holder for flexy shaft (I use the Einhell flexy shaft but Dremel one should work too - the inner dia of the hole is 21mm). It can hold a marker or a pen too.
- put M3 nuts in a slot
- put M3 screws in a holes
- put the flexy shaft in the big hole
- tighten the shaft with screws
- mount everything on mendel tool carriage using 2 M4 screws
Note that object is printed upside down.