The method 4 wherein said step of adjusting includes {TAIL ~ the step} of changing the distance between {HEAD ~ said spaced points} 
The method 4 wherein said step of adjusting includes { TAIL ~ the step } of changing the distance between { HEAD ~ said spaced points }
OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD