Drive Bar Stiffener Of Ball Mill

I needed tapered seat bosses for the ball joint studs so hacked some plugs off a piece of bar stock & jigged them up in the mill for facing & squaring.Met a guy who runs a one man grind shop where he mfgs & reconditions machine cutting tools.I took him my drawing with measurements along with a new 3/4" end mill & he profiled it to my specs.