cppC = [ dcover_slop_inside, cppD[1] ];
cppF = cppC + dcover_mainthick * [1,-1];
cppB = [ cppC[0], cppA[1] ];
cppG = [ cppF[0], cppK[1] ];
cppC = [ dcover_slop_inside, cppD[1] ];
cppF = cppC + dcover_mainthick * [1,-1];
cppB = [ cppC[0], cppA[1] ];
cppG = [ cppF[0], cppK[1] ];