In Reply to: Re: Questions from way back... Ray Steukle's book posted by tbran on July 10, 2008 at 16:33:55:
Stepped grain pans as you call them were standard in the cleaner shoes of Australian headers [ "combines" to Americans ] right until the Australian combine manufacturing industry was wiped out and in at least one case, deliberately closed down by American purchasers in the late 1970's and early 1980's.