If you're not changing toads, I would go with one of the fixed aux brakes like the Invisibrake. We have an Evenbrake, and even though it works well, it doesn't fit well in our Explorer and can be quite finicky to get set as a result. We used all Roadmaster parts only because their customer support was so amazing. I completed the install myself, and they were so helpful during the process.
Brian, Mary, kids, beagle - Moose, and mutt - Maggie.
2012 Greyhawk 31FS
2013 Ford Explorer Toad