A pliable sheath 273 slightly longer than L2 is placed over {TAIL ~ intermediate tube} 216 in bend region 218 to cover {HEAD ~ slots} 266 
A pliable sheath 273 slightly longer than L2 is placed over { TAIL ~ intermediate tube } 216 in bend region 218 to cover { HEAD ~ slots } 266
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH