Weber Leak

So, I have a leak coming from the middle carb (side drafts). It seems to be coming out of the carburetor itself because gas drips out of the intake. I took the tops off to check the floats and none seem to be damaged, my first idea was that the floats were not doing their job, therefor letting too much gas into the carbs. In the end, I will probably have the carbs rebuilt by a local weber guy, but is there anything else could check for that might be an easy fix?