I run one in England, worked great in barley, I had to order some 9mm screens for wheat as the barley screens were letting too much straw through. We have an old Volvo combine with round holes for the lower sieve and find that the airjet ones need to be the same as it used. I am sure the 9mm will sort the job out, you can see that there is much less chaff in the sample. I would certainly give it the thumbs up, much less losses too and no fiddling about trying to set it!! Very well made and nice and light.