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