The lettering guide is mounted upon the planar surface for {TAIL ~ rectilinear movement} along {HEAD ~ a plurality} of parallel steps 
The lettering guide is mounted upon the planar surface for { TAIL ~ rectilinear movement } along { HEAD ~ a plurality } of parallel steps
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH