According to the advise given to me by Garmin, I may need to install a heat shield to protect the roll servo from the exhausts infrared heat. Being that my servo consistantly fails above certain RPM's, it's likely an exhaust temp issue as they suspect. I made up a nice shield and painted it with high heat ceramic paint and will try it out. I'm not sure if a heat shield should be black though as it may need to be shiny and polished to reflect the heat. We'll see how this one works out.