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