Re: New Bunks on Trailer
I almost bought a new boat once with rollers (on pivotal racks) rather than bunks. It seems that the rollers would do best if you have a shallow ramp and the boat isn't able to float off the trailer and that was the major selling point.
I chose not to purchase them as even on the new boat sitting at the dealership you could see where the rollers were deforming the hull. It's called #/square inch and with the rollers there weren't enough square inches to support the # of the boat/or the hull was not of adequate construction in that area to resist deformation with the numbers applied.
When I replace bunks, I only use treated wood and never replace the carpet. I orient them in the same manner as the original (horiz or vert). Wet wood is very very slick and wood that has no carpet on it dries out much faster and offers less chance to rot than carped covered bunks that trap the moisture. Actually hull damage is less as carpet is very fiberous and abrasive. If you don't like the natural wood color, paint them!
My 2c,
Mark