I like that jig Malcolm. And useful for tapering as you say.
I use my Festool track now and again to straighten the edge of big lumber, but I wonder if this contributes to the anti-splinter strip getting beaten up. If the lumber is not flat the track will be moved as the saw travels over it, and I think this might chew the edge of the strip. I don't know, obviously. But for some reason my anti-splinter strips don't last that long!