Ok, I checked that my NAT is open, accepted your invitation and upgraded to Gold again.
Starting two hours earlier is fine by me. And while I want to play some rounds and not only get the achievement, I can promise that I'll make room for other players fast enough since I didn't get very much sleep these last days.
Well, I had some Arena-fun and got the TC award so I guess it's mission accomplished. Thanks for organizing.
Still, I had hoped for some more rounds with more people. I stayed a bit in the bearpit game after that (boy, I forgot how frustrating that Ring game is) but then I got too tired.
Stupid me, I quit directly from the game to the XBox system so apparently my frags were not saved. Gah!