I just purchased a new 8 hp 4 stroke yamaha (not the T-8 - couldn't afford that) for a kicker to replace a 1965 5 hp evinrude. Some have suggested that I get a support bracket for the kicker to use when I'm running the main motor. Is this necessary? I never used one with the little 5 hp. Does the additional weight of the four stroke make a difference? I mounted the new motor on the transom right next to the main motor. Thanks in advance for your opinions.