RE: BT Mustang for Strega?
Odds are that it will be fine with a little off each wing. Every pilot has a different skill level and one should look at things like the wing loading to determine flight characteristics. I just don't know enough about the model (e.g. it's 15 lbs or 10 lbs with some stated wing area). Depends on the airfoil type too. The World Models is an example of an airplane designed to be light and with really docile characteristics for those wanting a giant scale mustang. The Brian Taylor may be scale and heavier with a scale-sized wing planform, which leads to hotter landings and more attention by the pilot.
Michael