I'm in the process of doing just that kind of jig that slides along the table edges. The Grizzly table edges are parallel but the span is such that I need a bar to follow the miter gauge slot to maintain a straight line, and the miter gauge is my first try though may see if I can find some decent bar stock or rails on line. Wood rails to me are iffyFor another way to skin the same cat, I built a miter jig that just slides along the edge of my router table instead. A picture is somewhere in my uploads. It also allow me to clamp the piece to the jig so it doesn't move on me. I use it for doing half laps and for the ends of stiles. It eliminates the need for a miter slot for those jobs that way. And it costs nothing because you can make it from shop scraps.
QUOTE=DaninVan;2096489]If you want to go the setscrew route, use brass set screws. Problem solved.[/QUOTE]
If I had a few in my collection of fasteners, for sure that would be the way to go. We are in a high COVID-19 contagion area and 'that age bracket' soare hunkered down for the duration and wont wander the local hardware stores for a while. The steel set screws will need to do the job for a while
Roofner - Agree that a saw sled would work well for 90* cuts but odd angles are a PITA so use my INCRA