It's you!! It was me! I worked on one a couple of weeks ago, and on the test ride, that sucker was jumpy as h-e-l-l ! Took me a while to get semi used to it. The key is to set the ground speed lever ( the one in the middle with the knob) to just barely moving, then gradually bump it up with the palm of your hand. To me, the controls sucked! Glad I only had to work on it, and not use it!
It ain't rocket science!
'Course if yer house has more wheels than yer truck...