I am running a Duplicator 4S and building 140mm fan duct. I have added slotted holes to allow an easy fit up, but been having issues with top surfaces. As you can see from the photos the areas around the slots are not producing a good top coat layer. I am getting opening/voids. I was get the same issue on the bottom but increase the extrusion scale factor from 0.9 to 1.0 and releveled the printer bed that fix that problem and helped a little on the top, but the issue still remains. I have enclosed my factory file, what setting would you suggest changing.