Guide Step fix

I had issue with the original step file under Freecad: the Guide thread was not watertight. As such it was then giving me error when exporting to STL.

This one fixed the thread part. But I also have to redo the thread completely.
Additionally I put a Hole for an M8 screw to kept it up.

This one fit perfectly a Dremel 3000, for which the thread is a M19x2 (found info here )

By the way, I also find this remix on printables

• the base is enlarged for bigger dremel (I have the same problem with original base and dremel 3000)
• the screw cutter is well thought, and include a T-slot + guide for screw: that's what I used on the picture.