External antenna for the 902 @ 5GHz is very intriguing. Do you have a link to the antenna you use? I’m trying to recall where the antenna mount point is on the 902.
I just got my Aruba IAP-325 AP working (vanilla) and about to start experimenting with various configs. I’m intrigued by the 5GHz feedback from Bosco and Chris and others, this could be very interesting (Bosco or others, if you have an Aruba config that is shareable, please do…would love to learn from the learnings you’ve had so far with the Aruba!)