Geez, that sounds like a simple "great" idea!
I've never heard it mentioned before and many have asked about syncing carbs and buying/building a system to do the deed.
"Question": You said you can balance the pairs.
Balancing 1/2 and 3/4 I understand.
But, How do you know the pairs are balanced?
If you do not use exactly the same amount of oil,,,
would'nt that effect the appearance of the balance between the pairs?
Ride safe, Ted