Sorry Dave, but I don't see the point of your post.  First of all, in Case combines, the number of times that the crop circles the rotor is dependent on how your vanes are set.  If you retard them, the crop moves through slower, open them up, and it moves through faster.  Slower = more revolutions in the rotor, faster = less revolutions in the rotor.  At the Case combine clinic I went to last month, they said you could get the crop in and out of the rotor in less than 2 revolutions if you opened the vanes.  Second, how can you compare grain damage between a rotor and a walker machine and leave out the walker damage?  The rotor carries the crop mat through and out the back, the walkers do the same job in the conventional.  How do you leave the damage from one out of the equation when comparing them?  Finally, I think just about anyone who has run both will gladly compare a sample from a rotary machine to a sample from a conventional.  I had a Deere 6600, ran a Case 1680 for a couple years, and will harvest this year with a New Holland TR97.  I wouldn't go back to a walker machine.

Mike