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We use sm wire helical first then standard large wire and then a standard small wire and keystock grates in wheat barley canola and a few oats.

The theory is more aggesive theshing with helical, then large wire then lets more grain through and third small wire improves threshing of returns.

I like it. I think it does increase output and improves sample.I find we can run concave one number higher but never done a real like for like test.

Only down side is perhaps more trash on sieves in canola but again never done a real test.
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