It is {HEAD ~ another related objective} to attain {TAIL ~ this general objective} with substantial weight reductions for the drayable chassis 
to attain
It is { HEAD ~ another related objective } to attain { TAIL ~ this general objective } with substantial weight reductions for the drayable chassis
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH