I need to get a trailer to tow my rig. And I want to get one with brakes. I understand the brakes are electric on most of them and that you have to get an electronic controller to actuate them. Now, I'M NO IDIOT, so I don't need any info telling me stuff like "brakes are what stop the trailer" or other total newbie stuff. What I want to know is how do these electric systems work? Are they proportional or are they just on/off? How do the controllers work? What is required to install them (do they just hook to the brake pedal switch or something)? Lastly, if anyone could suggest a decent controller, list why, and give me an idea of how much I'm going to pay, I'd appreciate it. I've just never had the opportunity to see any of this stuff to examine it in person, so I'm going to be buying it blind.