OK, here is the new and improved vertically oriented CSP-488 Mk II:
I may improve on it yet again. My thinking is that I should cover the center of the strip holder, between the two retention strips on either side, with an inkjet transparency that has a number of vertical lines down it, to correspond the columns generated by the strips, and perhaps to designate them with a letter or a number to make it easier to read the columns.
Either that, or I may just run a piece of thread down the center for alignment purposes.