Simple supports for the Festool FS PA - FS Guide Rail Parallel Side Fences, as you can see they tend to sag when working with them. These are simple push on caps which allow the guide to hook onto the work piece.

NOTE: you'll need to re-calibrate the guides to allow for the thickness of the cap, simply loosen the big screw on top and the lever on the bottom and adjust the rail until it's at a known distance and tighten everything back up