A benefit to the use of either manifold 401 or 401′ is an increase in allowed tolerances during {HEAD ~ assembly} of {TAIL ~ the unit} 
A benefit to the use of either manifold 401 or 401′ is an increase in allowed tolerances during { HEAD ~ assembly } of { TAIL ~ the unit }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL