This shift of compression load allows {TAIL ~ the load} on {HEAD ~ the compression drivers} on both cycles to be balanced 
This shift of compression load allows { TAIL ~ the load } on { HEAD ~ the compression drivers } on both cycles to be balanced
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH