Full disclosure - We are sponsored by Aerocat.
I have built up what seems like 5 or 6 R509's in the last few weeks including one for me. I really like a few of the key design features - the head tube/downtube are fiercely stiff, the 1-1/4 bottom headset bearing (tapered headtube), the BB30. I have built a few into the just over 15 pound range and they're stiff too.
If your team has been working with the Pooles then I'd recommend helping to support the team and the Pooles by picking up another AeroCat. The 509 is a really nice frame for the $$.