I took an old circular saw and turned it into a nice track saw with a bit of aluminum and some plywood.
If I ever remake the track, I'll cut the slot only as deep as the thickness of the aluminum bar, which should eliminate the wobble I had to correct for in the end.
The pink stuff underneath the plywood is insulation foam, available at any big box hardware store. It makes it a lot easier to cut sheet goods, eliminating the need to hang cutoffs over the end of the workbench.
Tools featured in this video:
▶ Bosch Plunge and Fixed Base Router Kit:
▶ Rockler 3/4" Straight Router Bit:
▶ Freud Diablo D0740 40-Tooth Finishing Saw Blade: