Reply by Loren

You don’t need a Festool dust collector, just a compatible
hose and a vacuum.

With routers in edge cuts you need a fence with a shroud
below the base to get a lot of the chips. In mortising
cuts dust collection from above is what works. The
smaller Festool routers are optimized for one-handed
operation and chip collection in a range of tasks but
through-the-base chip collection is no better or worse
than other mid-weight plunge routers like the DW621.

I have the OF1000 by Festool and it is my favorite router
due to its pleasing ergonomics and maneuverability. I
don’t use it as a workhorse for mortising or any big cuts
for that matter.