Just a note. My carb rattled apart on the top assembly. I have had the carb just under a year. I called Jose at Weber North America. That was on thursday at around 4;00 pm Eastern time. I told him what happened and he offered a whole new carb (upon receipt of the whole old carb.) I opted for just replacing the top part that had lost   parts.    I HAD THAT REPLACEMENT BY NOON ON SATURDAY.