OK, so I've been through two (2) good storms with the new X738, 54" plow, HDAPs all around, and no additional weight other than my 3 point and Imatch. One of the storms was 16" and plowing up and down the driveway was just like driving on an already plowed driveway. The blade took the snow to the pavement, and a lift of the blade pushed the snow over the existing bank and further into the yard. I never even used the diff lock. All hail HDAPs.