Widcat, This company inspired modification came about in low yielding and_or complaint of rotor loss in corn. I strongly believe in tall rank green stem soybeans that this mod. will come back to haunt all that have done it.When you are trying to convey 30ft. of this green,sappy,ropey material 90" with half the cylinder bars be prepared to start later in the morning and quit shortly after sun goes down. In my opinion I would put the cylinder bars back in and run the F2 bars. I only have one machine out with the "disruptor" type lugs on the cylinder and so far have not been impressed as we have picked up some rumbling when evening comes.Remember,you have to keep flow of material and still be able seperate grain. Good luck, Hyper Harvest II