Which is better Electronic or Inertia, Pendulum type? Will be towing our new 21RS with an 03 Yukon XL. I want this to be an easy install with the pigtail that has factory GM plug on one end and controller plug on the other. Do you need extra fuse's when the truck is pre wired for brake controllers? I've heard prodigy is good any others as they are not available up here in Alaska.