---

I'm with Ric on this one. I used to think rollers and even roller bunks were the ticket but got a lot of wear marks in the fiberglass and when the wrinkles got noticeable, I got real concerned. Besides, bunks are easily replaced, easy to adjust, easy to maintain. Self-centering keel rollers help to protect the boat, and keep it straight when loading. As for supporting all the weight of your boat on 3 keel rollers or so, hopefully you don't have far to trailer it... bouncing down the highway on 12 to 16 square inches of support seems a little inadequate.
Try a combination that you'll be comfortable with - and use 2x6s instead of 2x4s for for larger area support.

And thanks for the "washer between the swivel brace and the wood" trick, Ric. Put them on tonight- made too much sense not to. 2@ 5ft and 2@ 3ft bunks... Plenty of support for a 1992 Rage 14ft Jet.