However, where the moldboard holes or the blade lengths are not exactly as anticipated, so that the skid plate does not rest fully in face to face contact with {TAIL ~ the ground}, i.e., tilting slightly upwardly or downwardly and making only partial contact with the ground, the skid plate may be detached from {HEAD ~ the mounting plate} 
However , where the moldboard holes or the blade lengths are not exactly as anticipated , so that the skid plate does not rest fully in face to face contact with { TAIL ~ the ground } , i.e. , tilting slightly upwardly or downwardly and making only partial contact with the ground , the skid plate may be detached from { HEAD ~ the mounting plate }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD