Further features provide adjustable positioning of {HEAD ~ the wheels} and the casters for {TAIL ~ a selective preferred balance} of maneuverability and stability 
Further features provide adjustable positioning of { HEAD ~ the wheels } and the casters for { TAIL ~ a selective preferred balance } of maneuverability and stability
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH