Hi, Wallace, I bought one of those quilting tools long time ago, and used it once on a cake board. The fondant wasn’t that thick but my pattern would still move, the lines would not match up… So I learned my lesson there. After that experience, if I needed to make a cake like that, I would use an angled triangle ruler (if you know what I mean) and do it that way. Measure the whole cake, mark where I wanted the lines and then do it that way by hand instead of using the tool, and you will not have a problem with the seams matching in the back.
Selma S. ~ Little Apple Cakes
