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