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