The base member has {HEAD ~ a longitudinal recessed V shaped groove} along {TAIL ~ a fiber engaging face} thereof, and a plurality of rectangular transverse slots spaced along the groove 
along
The base member has { HEAD ~ a longitudinal recessed V shaped groove } along { TAIL ~ a fiber engaging face } thereof , and a plurality of rectangular transverse slots spaced along the groove
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH