Looking to add a roller to my flatbed tilt trailer. Presently planning to have a 2" roller that would sit just aft of rear of trailer and the top of roller about an Inch and a half higher than deck height. Looking through past threads I see variety of positions. some completely on top of the deck, some behind but flush with top of deck. Having it sit higher would seem to help keep the boat in contact with the roller longer. Having it aft of trailer deck may allow it to be Easier winching on. Any thoughts? Thanks!