Looking at 2006 and 2008 used models. $30,000 and 675 hrs difference. 2006 with duals, 2008 with 800x70R 38. Both have 28L rear, are they hard steering? If you used a 9760 and 9770, did you see a difference capacity? Anyone tried PFP bars or extra narrow concaves? Which one would you buy? Hope you finish this harvest in 2009. Thanks.