On its downstream side, each fly weight 22 has a sloping face 25 which cooperates with a forwardly divergent conical surface 26 provided on {TAIL ~ the upstream side} of {HEAD ~ the nut} 18 
On its downstream side , each fly weight 22 has a sloping face 25 which cooperates with a forwardly divergent conical surface 26 provided on { TAIL ~ the upstream side } of { HEAD ~ the nut } 18
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH