I didn't see the X Avenger on the discontinued list. I can hyzer flip to straight with minimal fade a Z XL in considerable wind (15mph or less). A Z XL is very similar to a seasoned dx teebird- thats better A Z XL has a straight to understable flight. So you can hyzer it to flat and go straight but it won't work a complete hyzer flight-depending on your snap.
Yeah, when I think Teebird, I think stable Champion or Star. I see your comparison to the dx Teebird. BTW, where is that list of discontinued discs? I looked for it, but couldn't find it.