A device 1 wherein {TAIL ~ said members} are dimensioned to compliment the dimension of {HEAD ~ said spaces} in such close tolerance to said elongate bars that said members clear material blocking said spaces when said carriage assembly is actuated without wearing said elongate bars 
A device 1 wherein { TAIL ~ said members } are dimensioned to compliment the dimension of { HEAD ~ said spaces } in such close tolerance to said elongate bars that said members clear material blocking said spaces when said carriage assembly is actuated without wearing said elongate bars
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD 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