Where does one go and set the modes in the controller software? I don't see it under Config -> Radio. I'd like to do n/ac only or perhaps ac only.

@Alfredo. Thank you for the input on what you used to get this working. I'm trying to get it done in Apache and haven't had much luck. Hoping you could share your configurations on github/gist?...

I'm converting my 3700 sq foot home in the US to have something that supports seamless roaming and band steering. Currently I have the 3 Airport Extreme's on 1, 6, 11 for b/g/n, and 36, 132 (DFS?)...