Working on my setup now. I will have...

1 Power Expander Pro (has some new nice features - definitely want to get it - Sport isn't out yet).

2 Fromeco Regulators wired with deans connectors in and out

2 Fromeco badger switches wired with deans in and out

2 Fromeco lithium ion batteries wired with deans connectors


My battery, switch and regulator setup is redundant and feeds both power expander power input/output connectors with failsafe switches.

Like someone said, regular switches are ok - you don't NEED the failsafe switches since you have a redundant battery supply and redundant switches but I'm paranoid.

The Smart-Fly turbo reg and super reg both have redundant regulator circuitry but a single control circuit - so, if the control circuit fails, its over with but these are still both very nice units. I just went with the fromeco since they are both seperate units.