This is a filament guide and dust collector I designed for the Rostock Max v2. I needed the filament guide because I am not 7 ft. tall and living in a dry desert environment it is hard to keep dust out so I followed the trend to create something to wipe the filament as it feeds.
You can print this box side down without supports using ABS if you go slow. I used a layer height of .15, temp 222, 22 mm/s feed. It takes 3 hours but is printed smooth.
If you decide to print legs down then use rafters only.