An vacuum adaptor to fit your makita 5007 series circular saw, collects most of the sawdust. I made it to fit my Ridgid shopvac hose, which has an outer diameter of about 32mm. The printed one in the picture is slightly different(bigger flat part) then the STL file.
It is attached to the saw with some strong double sided tape for now and seems to be holding.
Apr 2019 - added Fusion 360 file.