A grain bin forward of the engine compartment includes {HEAD ~ a grain bin extension skirt} mounted above {TAIL ~ the grain bin} 
A grain bin forward of the engine compartment includes { HEAD ~ a grain bin extension skirt } mounted above { TAIL ~ the grain bin }
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL