Tie Down Engineering
John,The drum brakes on my Hunter 23.5 trailer were extremely rusted because the previous owner had a slip and only used the trailer for storage. I bought a SS disc brake kit from Chamion Trailers (www.championtrailers.com) Their web site has a lot of good technical information as does the manufacturer Tie Down Engineering (www.tiedown.com/g4brake.html). I haven't really put them to the highway test yet as I now keep my boat at a marina, on the trailer, to save on slip fees. I did get a slip salt residue between the first couple launchings. A freshwater rinse is very desireable whenever possible. Make sure the Surge Brake actuator is sized for disc brakes if you didn't buy it as part of a kit. Disc brakes also require some kind of by-pass when reversing. All the details are covered in the Champion Trailers web site info.Good luck,Tom