This is just a modification from the "Dremel Mount by stiganielsen" (http://www.thingiverse.com/thing:892963) to fit the Dremel 3000.
The top part have 55mm of diameter.
The bottom part must be downloaded from the original files (from stiganielsen)
- because I didn't want to change the bottom part yet, some part of the top part became thin near the flat base so booth rings still concentric. As an update I will need to change booth parts, putting the Dremel farther from the base to avoid this.
I recommend print it in ABS.
I used the Rhino file available from the source (http://www.thingiverse.com/thing:892963) and did the modifications using Rhinoceros 5.
As it is a "work in progress", I will make some adjustments latter and maybe upload an updated version of the bottom part also.