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