StewMac Style Proxxon Router Base

This is a third party Dremel router tool based on the design of the guitar maker Stewart MacDonald.
It was purchased on Ebay from Australia, so i cannot guarantee that this design will work on a genuine StewMac router (i suspect it will)
All of these router tools only seem to accommodate for Dremel threads, So i have modified the thread so that it will fit a Proxxon FBS 115/E.
I have also modelled the tube for if you decide to attach a pump to blow away sawdust.
I didn't allow for much toler