On my four recent projects I selected the "Center on Board" option for the carve location and the CW carved the project but not on the center. I measured three random boards to verify the CW was measuring correctly. It's not. First board actual 12" X 3.5" MDF the CW measured 12.047" X 3.602 not bad. The Second Board actual length 18" X 3.5" MDF the CW measured 19.307" X 3.592". Bad! The third board actual 26" X 2.3125(5/16)" (Oak Plywood) the CW measured 28.493" X 2.439" Worse! Does anyone have any ideas what could be wrong? I did place masking tape on the boards for the tracking roller to follow.