My original idea was to thread fibres through the lines of holes to accentuate the notation through color and touch, and you may just be able to make out the threads and the holes in the second image (the back of the pocket journal). However, the paper proved too thin to do threading in the style I first imagined.
I still have a considerable length of paper left, and I'd still like to try the threading. Earlier today I stuck the pianola strip to a sturdier paper and used a paper pricking needle to punch the holes into the new layer, ready to sew. More on that when I've actually done it.