Between {HEAD ~ the cylindrical rebate} 27 and the sloping surface 25, each fly weight 22 has {TAIL ~ a radially extending thrust surface} 29 
Between { HEAD ~ the cylindrical rebate } 27 and the sloping surface 25 , each fly weight 22 has { TAIL ~ a radially extending thrust surface } 29
OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH