Just back the boat into the water until the boat starts to float. Fire up the engine, warm it up, and have the tow vehicle driver back up slowly while you reverse the boat. Just drive it off. When you put the boat back on the trailer, back the trailer in until all but 3 feet of the bunks are under water. Slowly drive it on until the bow latch clicks and you're done! If the Lexus won't push the boat to the stop, the trailer isn't in deep enough.