There may be places a milling arm can't reach, but if you can do it by hand with a Dremel, you can automate it with a gantry and motors and stuff :) Seems with

There may be places a milling arm can't reach, but if you can do it by hand with a Dremel, you can automate it with a gantry and motors and stuff :) Seems within the realms of hobbyist attainment. Some kind of rig that works in unison with a 3D printer...