Excellent. Thanks, Jules, for pointing me in the right direction.

Take a look at the attached pic. It was my 3rd print, after two successful Quickstart App prints. This one originated from thingverse calibration cube at http://www.thingiverse.com/thing:1067439 printed in Simplify3D. The top of the holes is not perfect. What would I need to adjust to fix that? Apol...