what brand coupler is it ?
I suspect they are better in salt water too. Since they can drain much easier and be rinsed. However, the cost of converting vs the number of miles I'll be traveling doesn't compute.BTW, on a heavier trailer, you'll generally be better off with disc brakes rather than drum brakes. Disc brakes have a bit less stopping power but are far more fade resistant.
I suspect they are better in salt water too. Since they can drain much easier and be rinsed. However, the cost of converting vs the number of miles I'll be traveling doesn't compute.