To ensure the platform follows a linear path in the Y direction without Z axis deviation, one or more embodiments of the invention contemplate {HEAD ~ the use} of {TAIL ~ a computer control system} 
To ensure the platform follows a linear path in the Y direction without Z axis deviation , one or more embodiments of the invention contemplate { HEAD ~ the use } of { TAIL ~ a computer control system }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL