The side of the cradle 50 which receives the brush core is recessed in the center, and includes a pair of inwardly extending keys, 90, 91, arranged in a line and straddling {HEAD ~ the central bore} of {TAIL ~ the brush core}, as seen in FIG 7 
of
The side of the cradle 50 which receives the brush core is recessed in the center , and includes a pair of inwardly extending keys , 90 , 91 , arranged in a line and straddling { HEAD ~ the central bore } of { TAIL ~ the brush core } , as seen in FIG 7
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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH