Is there a setting in Slicer that can help with the rough surface and/or voids I’m getting where support material interfaces with the body of the actual part?
Mac
Do you have an image of what you’re encountering? Posting the Gcode file as well will help.
Yous can see the roughness in these, but the voids are tough to see.
The gcode file is over 4MB it’s here: https://dl.dropboxusercontent.com/u/64611615/Clamp-nolift.gcode
Speaking of that is there a good gcode viewer?
I tend to use http://jherrm.github.io/gcode-viewer/ or Cura to look at gcode. Do you have an image of the print for this item, showing the areas?
You may also want to consider printing this at a 45 degree angle, to keep both clamps strong, similar to this: https://plus.google.com/105535247347788377245/posts/E2rgyQWrRQb
Try changing the pattern spacing, and see if the different support styles (line or hexagonal) change things. What size hot end nozzle are you using? How many bottom surface layers are you using?