I have run a 9650 with a 1293 ch all fall. I doesn't shell at 5.5 or 6 as some will tell you that the 9750 does, but it doesn't cost $150 per horse more either. We average (when the combine does work) 14.9..15.6 acres pre hour generally shelling at 4-4.5 mph. The combine handles the 1293 quite well and I know of no modifications needed to do it