The easiest way to make a flipper in DSL is to put three Storm front-hinge burst motors next to each other (four, if you're feeling REALLY crazy) and mount some kind of flipper panel on each of them. 120cm skirts are a good choice for DSL-S, for IRL I like to go with 40x120 armour panels. Wire the burst motors to fire at the same time, put a wedge on the front, and boom, you can throw superheavyweights halfway across the standard tournament arena. They eat up battery like nobody's business, but generally speaking your opponent will be OOTA before it becomes any kind of concern.