Ivar vertical cable management

I bought some IKEA Ivar shelves and am still figuring out the best way to organise them. Among the problems I have is cable management, and while there are a bunch of great solutions out there, I don't want to drill anything into the shelves or glue things on just yet, because I've already rearranged things a few times and am planning at least one more major reorganisation of the whole setup. For the cables that are running vertically, I could simply use hook-and-loop tape to tie 'em to the vertical pieces, but the problem I have is that the tape tends to slide up and down on the vertical pieces and I end up with the cables still flopping around a bit. So I designed this simple little doohicky to solve that problem. The pins fit into the Ivar verticals and hold it from going up or down; the cables fit in the center channel; and then hook-and-loop tape wraps around this widget, the cables, and the vertical support. The protruding sections at the top & bottom of the side supports give ju