An intermediate shaft interposed between {HEAD ~ the additional and main change mechanisms} is also supported by {TAIL ~ the support frame} 
An intermediate shaft interposed between { HEAD ~ the additional and main change mechanisms } is also supported by { TAIL ~ the support frame }
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL