I've been trying to print out this stupid little piece for the past two days on S3D.
No matter how I turn the many knobs, increasing infill %, adding top layers, going slow, etc., I keep getting crappy prints with ugly holes in the top layer.
Earlier today, I decided to print on the free software that comes with my printer (MatterControl). Lo and behold, it prints MUCH better than S3D - it has no huge holes in the top.
Needless to say, I'm fairly miffed. I should be getting much better quality for the price I paid. What the heck is going wrong? I'm going to need a fix on this soon, because right now I'm not sure I would recommend S3D to anyone else.