I recently bought a Time Capsule and already own the previous version of Airport Extreme (not dual band, but n/g/b) I want to make the Time Capsule the primary base station and the Airport Extreme the extender. I have both n and g devices hitting my network. For the best network throughput, I need to make the Airport Extreme just g only, correct? If I don't, the network performance will "downgrade", correct? Thank you for your suggestions in advance!