That just sounds silly. I do not know what model that would be but I can tell you that will not work. Carbs have to be synch separately in relation to each other . If you join them together then what you did is not called 'synchronizing carbs'.
Mike before you claim BS you might try reading all the post and better yet try using Google with key words of carb manometer there you will find the device that is being spoken of. While not used by many when built properly they are very accurate; I had to be reminded of what they were to recall that my brother built one that stood like 4 foot tall and with that thing he could balance his BMW twins with absolute precision.