On my 25.5, I've got a 1GM10 with the engine control in the cockpit. The control has too much play and I'd like to tighten it up. Does anyone know how this control comes off (aside from waiting till it does it on it's own!)? There's a chrome cup, the handle with knob, a black button(Transmission)in the middle of the cup. Opposite the handle there's a small hole in the cup with an Allen screw inside. That comes out easily enough, but the next step is not leaping out at me. Thanks