I have gotten much better prints since I've started using S3D, but now I have strange problem.
There is a gap between the outer shell and the inner shell. I'm using 100% infill, but for some reason Simplify3D seems to ignore this, and prints "hollow" parts.
I read on the forums, and someone suggested increasing the Outline Overlap setting, so I tried that next. I changed the default value of 15 to 40, and this fixed the gap issue, but the outer shell of the print started messing up again.
Pics of the prints with 100% infill and the Default Outline Overlap setting at 15: