RE: Unexpected flight characteristics
Hi!
That +1/2 degree wash-in is what makes all the trouble!!! Get rid of it , or better make that -1/2-1 degree at the wing tip (wash-out) in both winges and the plane will behave much better.
No mix should be used! Also check that the front wheel (if you have one) is not turning too much as the plane will be very sensitive at take off it if it does.