using the tested angular difference between the first test toe angle and {HEAD ~ the second test toe angle} to determine whether {TAIL ~ the tested angular difference} is within the alignment range 
using the tested angular difference between the first test toe angle and { HEAD ~ the second test toe angle } to determine whether { TAIL ~ the tested angular difference } is within the alignment range
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH