We ran the extended bar and tried lots of other things for green stem beans as an oldman has forgotten. We wer on a yearly roll on combines. We ran a couple of R 72s but our dealer got so he couldn't move them as well as R 62s, so we went back to the R62 with the electronic pump and couldn't tell a lot of difference between the 72s and 62s, We dumpa lot of corn on the go and the older 62s had to be backed off when unloading, but the 72s and the electronic 62s would hang in there. last year the 2388 would run 6.5-7.5 mph in 200 bu corn with 8X30. and it out cut side by side a jd 9660 with their new 30' head in soybeans and done a less ragged job. We had a neighboring farmer with a cih 8010 with a 12X30ch that was running 7-8mph 185-200 bpa had a one day harvest of 35000 bu. Now he had a lot of down time. but if they get that worked out it is awesome. As another neigbor with a 9650 said about our gleaners was you don't even want to be across the road from us let alone in the same corn field. So I think cih has raised the bar. When we went to the new header from gleaner that fed really even we just ran out of power cutting beans. Cat brought a 475 and ran about 1mph faster side by side