Hi, I have just took the plunge and purchased a motor mover for our twin axle van. While I was doing my homework into which one to buy I had mixed feedback to which size battery I would need (85amp or 110amp). It is a Powertouch Twin (the one with 2 motors) and my van is 1642kg. I will only use it to put the van back into storage which is flat with no obsticles and to pitch on the occasional difficult to get onto pitch. I already have the 85amp and would like to avoid spending more money plus the weight issue. Which one do I need? thanks in advance for any feedback, Craig.