FIG 1 shows {TAIL ~ a first limit switch} 26 near the front end of the right hand spherical guide 8 and a second limit switch 27 near the rear end face of {HEAD ~ the spherical guide} 
FIG 1 shows { TAIL ~ a first limit switch } 26 near the front end of the right hand spherical guide 8 and a second limit switch 27 near the rear end face of { HEAD ~ the spherical guide }
OTH OTH OTH TAIL TAIL 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