I have a 1999 single axle trailer made by VM. It's equipped with the hydraulic surge brakes. There is a lever on the front of the trailer that has two positions: towing and backing up.<br />When I tow the trailer that lever is always in the 'towing' position. But I have never moved it to the 'backing up' position when backing down the ramp or the driveway. How important is it to move that lever every time I am at the boat launch or parking the trailer onto the driveway? What does it do? What happens if I always keep it in the 'towing' position?<br />Thanks.