Going to use third channel needles on my boats. My question is where to mount them. Should they be up near the carb on an outboard or can they be mounted lower, next to fuel tank. Where does everyone put these? On my cat mounting will easily be near carb. I set up my Jr XS-3 radio buttons for the third channel and it is going to be sweet for adj. very small increment adj. can be made, can't wait.