Flange 37 must be fixed sufficiently forwardly on forward section 28 to prevent {TAIL ~ interference} with slidable movement of {HEAD ~ rearward section} 26 during longitudinal repositioning thereof 
Flange 37 must be fixed sufficiently forwardly on forward section 28 to prevent { TAIL ~ interference } with slidable movement of { HEAD ~ rearward section } 26 during longitudinal repositioning thereof
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH