Mounting brackets 303 and 304 allow optic placement and {HEAD ~ removal} for {TAIL ~ cleaning} and inspection 
Mounting brackets 303 and 304 allow optic placement and { HEAD ~ removal } for { TAIL ~ cleaning } and inspection
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH