I've been using a table saw with a sanding disk for years. When you make your taper boards, put a small stopper block on the end of each. That way, you can rest the taper board against the rip fence and once you have the taper board adjusted, you just slide and turn the shaft along the board sanding the taper as you go until the shaft hits the block at the end of the jig. Each taper comes out the same length and thickness. No undergrinding into stubby tapers or overgrinding into needle points. I agree that you shouldn't go too fine with the sand paper. I generally use 80 grit. Good luck.