Summary

A plunge router based on M8 fittings to attach to a Dremel .

Instructions

Print the top and bottom.
Get two long M8 bolts (with threads just at bottom) and saw off heads.
Attach bolts onto base. (If you have any suitable springs you can add these if you wish).
Slide the top onto the bolts and attach thumbscrews.
Add another fully threaded M8 bolt as a depth stop and attach smaller thumbscrew.
Screw on Dremel.
Rout.
Note1 I haven't actually had a chance to make this yet so any feedback
welcome.
Note2 This is only the second thing I have designed in openscad so it may need some tweaking.

Dremel plunge router