This line controls the Y axis motion and Z axis motion of {TAIL ~ the platform} and is designated {HEAD ~ the YZ movement line} 
This line controls the Y axis motion and Z axis motion of { TAIL ~ the platform } and is designated { HEAD ~ the YZ movement line }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD