I used the "parallel positioner" a lot, and I do find that I use the bars with different settings for tapered cuts more than I expected to. I see the F&F as more of a cutoff jig and the parallel guide bars for precision ripping. If I need a quick rip that's cabinet saw tolerance I use the rip fence on the my Felder saw. If I want precision and the cut quality you get when stock is clamped to the slide I use the parallel bars from Brian Lamb. Since I got air clamps I don't use the F&F jig. I don't think I've used it for over 5 years. Not even sure where it is in the shop.