{TAIL ~ The frame} has at least one mounting point at {HEAD ~ one end} of the upper surface 
{ TAIL ~ The frame } has at least one mounting point at { HEAD ~ one end } of the upper surface
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH