https://www.micromark.com/Prox...er-Saw-for-Hobby-Use
The top part of the jaws open wide enough to hold either Ross or Gargraves track.
Perfect straight down cuts on any angle. I did need to tape up the plastic blade guard.
I use an abrasive disc, but you can get this instead:
Perma-Grit Tungsten Carbide Abrasive Blade For MicroLux Tilt Arbor Table Saw And Proxxon Chop Saw