See if you can find a Craftsman RAS & take a look at how its system works. They have a threaded piece that dropped into a hole with a threaded rod with a pad like a c-clamp that was threaded that tightened from behind the fence to push & clamp the table top pieces up against the back side of the fence. I have both a 10" & a 12" from the 60's.
"Forget the flat stuff slap something on the spinny thing and lets go, we're burning daylight" Bart Leetch
"If it ain't round you may be a knuckle dragger""Turners drag their nuckles too, they just do it at a higher RPM"Bart