Folks, trying to add an aftermarket easy access Fuel Screw, but how in the heck do you get off the stock one? There's a small, almost flush component, just in front of the carb float bowl with a small hole in the middle of it. I thought it may be a small 1-2mm hex nut, but it doesn't appear to be? I tried a 2mm hex tool and it's too big, a 1.5 mm is too small, so how do I get this thing out to insert the aftermarket. Also, how in the heck would you even adjust it in stock form if no tool works with it? Thanks!