Heres a video of my 1953 40 at work today. It was the first real test of the old IH hammer mill I had been repairing most of the winter. It passed the test well. Ran smooth and quiet compared to the old Case mill. The fibre pulley seems to have less slippage than the cast steel pulley that the Case had. I used the straw screen and it chopped the oats well enough for cattle feed although a little coarse. The fine screen has such small holes that I think it would really slow down the capacity.