a receiver module housing, wherein the second end of the tube is mechanically coupled to {HEAD ~ an outer surface} of {TAIL ~ the receiver module housing}; and 
a receiver module housing , wherein the second end of the tube is mechanically coupled to { HEAD ~ an outer surface } of { TAIL ~ the receiver module housing } ; and
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH