The 2009 2900MK has a dry wt. of 8,741lbs. The 2010 2900MK has a dry wt. of 9,020lbs. We haven't changed a thing on the units however, we installed new scales at the end of the line that weighs each unit going out the door. 2009 models didn't have the options included in the dry wt. the 2010 models have all the options included in the dry wt. so they both should weigh just about the same.
Thanks,