I spend quite a bit of time picking rocks, but some farmers are to big to waste time rock picking. It seems rock picking is all I did in summer growing up on the farm. lots of land or rock rollers around. work good if weather lets you use them.
I had Hyper II put a set of chrome loewen bars in my N6 and I am real happy with them. I also had Dave put loewen concave in at the same time. New bars and concave made a world of difference. Pete Hinrichsen