I think this has been discussed many times but still struggling and thinking I'm doing something wrong. We have a dolly with two fat tires. It has a single red band to support sunfish under boat. We wheel it to the water. Hoist the sail. Hold off on daggerboard and rudder. We push dolly into water until we are knee high. then we tilt the dolly but inevitably the boat does not slide off. We have to push and pull and tug for a few minutes until finally sunfish floats. Yet when I watch videos it looks like a snap of the wrist releases the sunfish. Does anyone have any ideas what we are doing wrong? Thanks!