I JUST GOT ANOTHER BOAT THAT HAS A ROLLER/ TILT TRAILER AND I AM NOT SURE HOW THIS WORKS. THE FIRST TIME I LAUNCHED THIS 21' CABIN CRUISER IT SLID( ROLLED) OFF THE TRAILER HIT THE RAMP TWICE AND SPLASHED DOWN AT DOCK SIDE! IT WAS SUCCESFUL IN THE FACT NOTHING HAPPENED TO THE BOAT AND IT...