{HEAD ~ The mounting assembly} weighs considerably less than {TAIL ~ a spindle or barrel cam}, and therefore, is considerably easier to reposition and adjust 
weighs considerably less than
{ HEAD ~ The mounting assembly } weighs considerably less than { TAIL ~ a spindle or barrel cam } , and therefore , is considerably easier to reposition and adjust
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH