Print with the back facing down on the build plate. This will allow you to print without any supports. Use a ¼" drill to clear the holes just so your router bit shanks don't bind. You might cut yourself if the holes are too tight and you have to pull them hard while holding the carbide cutting edges.

I find the 6-inch 8 gang unit to be the most versatile because you can use it to store eight ½" bits or just skip a couple slots in between for larger bits.