means for adjusting the support and guide mechanism with respect to the power tool, said adjusting means operating to raise or lower the tool with respect to {TAIL ~ said support and guide mechanism} to vary the extent of operation of said tool on the surface of {HEAD ~ the workpiece} 
means for adjusting the support and guide mechanism with respect to the power tool , said adjusting means operating to raise or lower the tool with respect to { TAIL ~ said support and guide mechanism } to vary the extent of operation of said tool on the surface of { HEAD ~ the workpiece }
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 TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD