Pretty amazing what you can print with no supports. This is straight off the printer, no cleanup.
Give it a whirl if you’d like: https://dl.dropboxusercontent.com/u/41117656/zeepro/30mm_cube_hole.stl
It’s not nearly as good as this one, but a fun test nontheless:
Very nice. Sadly it does not work that well with me. Even with supports I have some curling and thus some not nice surfaces What where the Slicer and settings and material you used for this?
Simplify3D with the latest settings that I’ve posted here: