After all the great feedback from you guys I've decided to go all out with upgrades and make this 30' aluminum trailer a heavy duty universal sailboat carrier. I'm adding cross members between the aluminum I-beams for added strength, extending the center roller carriage from 8' to 12' with 3.5" x 12" HD keel rollers 13.09" on center putting the rollers approx. 9.5" apart on 3"x 3" x 1/4" angle bolted to 3" x 10" x 12' carpeted guide timbers. I'm also adding 4' to the center beam to allow 7' of adjustment on the winch and dead man post. Once my boat goes back into the water this upcoming season I plan on upgrading my axles, springs, and wheels from 7k to14k lbs combined. and building adjustable hand crank jack stand style bunks. I figure this would give me a good bit of versatility for the present and future hauling needs of both me and my buddies plus I may consider renting it out at a low fair rate if insurance cost allows. I gladly welcome your ideas and suggestions. Thanks!