Looks Great, however a couple of items for small correction for accuracy (sorry, i'm O.C.D.) The wings are solid white colored and do not have the grey shade on the A319, the engines are a beige tone like CO, yours look more white colored, lastly the door sills have been adjusted. The paint outline around the main entry doors has been moved up like all new airbus deliveries and also all UA planes have a grey dot right at the center portion of the sill of the door. Thank you for acting so quickly, I know so many of us are excited to fly planes in the new merger colors. It looks awesome. Hope you can tweak with the modifications. Below are two links for what I meant by the wing color and the doors.
http://www.airliners.net/photo/United-A ... 1854010/L/ - for the engine colors, dot on the L1 entry door sill, and the readjusted outline of the doors.
http://www.airliners.net/photo/United-A ... 1772364/L/ - For the wing colors
Hope this info is helpful for accuracy