Stinger Foil Drive Trench SeriesFoil Drive Trench Series V5. 2 5 Why the Trench ?? #1 Reduced drag by decreasing the surface area. #2 Improved Weight Distribution because the battery is closer to your feet for optimum control. #3 Extended battery life due to less drag which gives you longer foiling time. #4 Less surface tension on touch downs, so you dont stall or plow into the water due to drag. The board skims across the water without the battery box touching, allowing for