If you’ve got a suitably high-end 3D printer, one solution to this problem is doing the supports in a water soluble filament; just toss the print into a bath and wait for the support to dissolve ...
Despite a few holdouts like Lulzbot, the entire 3D printing industry seems to have settled on 1.75mm filament. New Printrbots are exclusively 1.75mm, and Makerbots use 1.75mm filament. The Dremel ...