Can someone share their settings on Tekonsha P3? I have Jayco Jayflight 22FB 5500lbs loaded, towing with Tundra 2013. Tundra is 6500 lbs loaded (passengers, fuel, cargo) I can not lock my wheels when setting brake controller. At Boost one and setting at 7, I can feel the trailer jerking TW. So i changed it to no Boost with 9.8 setting. I can stop w/in 30 feet on flat with this setting at 30 mph without applying TW brakes just using Lever on the controller. Whats the proper setting since i can not lock up my wheels with any of the settings? Any suggestions?