The alignment tool 1 wherein said first distance sensor is positioned to measure the distance of a first location of said reference surface from said sensor and to measure the distance of a first location of said workpiece from {HEAD ~ said sensor}, said tool further comprising a second distance sensor positioned to measure {TAIL ~ the distance} of a second location of said reference surface from said second sensor and to measure the distance of a second location of said workpiece from said second sensor 
The alignment tool 1 wherein said first distance sensor is positioned to measure the distance of a first location of said reference surface from said sensor and to measure the distance of a first location of said workpiece from { HEAD ~ said sensor } , said tool further comprising a second distance sensor positioned to measure { TAIL ~ the distance } of a second location of said reference surface from said second sensor and to measure the distance of a second location of said workpiece from said second sensor
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