Disclaimer: This is not a CNC project at this time. The next version is going to be, but it’s useful for everyone with a table saw with a sled.
It’s called Fritz & Franz and helps you saw basically everything but most importantly very small pieces or wedges without bringing your fingers in jeopardy.
The smaller part is clamped down, the bigger part is movable.
I made those tiny sticks with it, 0 problem, no fingers even close to the blade, 100% precise:
More information on how to make it here, also an old video.