I'm considering purchasing a Powrtouch mover. My caravan is 1300kg. Powrtouch have a "Standard" and a "Heav duty" mover. They've recommended the Heavy Duty as they say the weight of the van is at tthe top end of the Standard's capabilities. I don't need the mover to get the van up a steep incline, just to move it on to our flat drive. Does anyone have a Standard model on such a van ?