I don't recall directing that comment at you. I merely stated that I was told by many that it would not work( I'm glad I didn't listen....my guess is they never tried it). I have alot of experience with electric brakes on other trailers. They WORK. I took it upon myself to install them on my boat trailer when the hydraulic surge brakes failed from corrosion and took the trouble to seal them well. Use tinned marine grade wire and don't use the trailer for a ground. Support the wire properly from flexing. Nothing more nothing less. I didn't reinvent the wheel here guys. I use electric brakes for my other trailers and already had the controller and wiring installed. They have been on that trailer for 7 years without any indication of wire corrosion or failure. I do inspect them, just as you should with surge brakes. The drum brake mechanical portion of the system is no different from the surge brake system in terms of parts. It is just how they are actuated that is different. They can be fine tuned with the touch of a finger depending on how heavy the trailer is loaded which is way more difficult to do on surge brakes. You don't have the coupler maintenance to contend with either. They also accomodate an extendable trailer tongue, which I also installed.
I have only stated facts that electric brakes are an option. I have no problems debating the subject, but at least interject with worthwhile information. I thought, that is what these forums were for, information sharing. If you have installed them and they didn't work, then I would love to know what part failed. Just because you say they don't belong on a boat trailer, I proved from EXPERIENCE that you are WRONG. I wire my trailer lights in the same fashion. Separate grounds, sealed LED lights, properly sealed connections, and marine grade(tinned) wire. Do it right once, and be done with it.
I'm certainly not going to remove them from my trailer because you said they don't belong there. They get immersed in 3 ft of water for a couple minutes, not for days at a time, water does not permeate any of the electrical portion of the system. You don't even need to unplug them or the LED trailer lights for that matter(they don't get hot,so won't crack from the water).
Some people like Chevy, some like Ford is all.......BTW I like Chevy
I am happy to share what I've learned from many years of tinkering. I have built and flown or drove airplanes,cars, snowmobiles, boats, and all other kinds of machines with a high success rate. I certainly won't try and convince you to do something that will fail.
John