if you use that metal link you make, but on the second engine turn the carburator around, weld like a metal sheet in the middle of the linkage so that it sticks up, then attach the linkage securly to the throttle thing on the carb, and then the throttle linkage fromm the servo will connect to that metal thing stickin out, if you dunt get it, PM me, i will draw it for you an explain, its really simple, like mentioned when you are bashing that it will like mes up, not really, if you secure it tightly but giving it enough movment everything will be ok