Interesting!! Do you laminate the layers with the grain in different directions to overcome short grain?  Another addition for you that I've tried a few times for my box corner splines, is to include a sheet of coloured paper in the laminate.  It obviously gives a very fine line when cut.  I keep thinking I should try more sheets of paper, either to give a slightly thicker fine line, or different coloured papers to give a different 'pattern'.    I have friend who uses sheets of white paper when making his ukulele purfling strips.