You'll probably overload the walkers with shelled corn and you'll be feeding the pheasants.
Just for kicks, I got out the old 105 owners manual to see what they recommended pertaining to filler plates. The only mention of filler plates in the whole book was a warning not to use filler plates at cylinder speeds over 600 RPM's. There was nothing that I could find telling us anything about installation or when to use them. Fillers aren't even mentioned as an accesory. I do remember an owner's manual Mentioning something about filler plates and corn. I'll bet it was in the cornhead book and that's out in the shop.Jim