I made a thin-walled socket. It was to have a 11/16" extruded cut for a hex nut and 3/8" extruded cut for the square socket wrench. It was 7/8" in diameter and 1-1/2" long. when I sent it be printed on a Makerbot, it came out with the hex nut and the square about 1/32" smaller than I specified. The diameter and the length were only slightly off. What could be going on? I'm new to this so if you know of a tutorial dealing with dimension conversions on Makerbots, please direct me. Thanks. PS I attached the SLDPRT