[Overdriven]

I'm not sure if you've considered this, but you don't need a duo to charge two 3s packs at once. A y harness for the balance taps and the main leads will let you charge two 3s packs as one 6s. Thatas what I do on my 610i. And a single LBA10 can do 6s with the right tap so you just need a 6s capable charger. Unless all your packs are totally different ages, amount of runs, mah, etc then thats not possible on a single lba10 or on one side of a duo.