I am replacing my bunk boards on my 19 foot trailer. My boat sits very low in the trailer and am constantly worrying about my outdrive hitting the ground when going over dips or bumps (it has happened on more than one occasion). I am thinking about replacing the current 2x6x8 bunk boards with 4x6x8 to gain extra clearance. Has anyone done this with their trailer? If not, do you know of any problems that could arise because of the taller wood? Thank you!!!