The Aerobird Extreme handles the wind really well, it's quite heavy and has a huge wingspan (55"). It flies in wind that the Commander and Challenger just turn turtle in!

Indications that it the wind causing problems can be any of the following:

Fails to turn into the wind direction
Turns upside-down for no apparent reason!
Suddenly dives
Suddenly gains altitude, stalls, comes back down again very quickly

Tim....