opjose,

You can not see anything on wing incidence from a picture. I believe most bipes lower wings would be set at 0deg and the top wing may be 0deg or -1deg. If you go by what you see in the picture you showed it would indicate that the stab is also positive.

Also if the wings are not correct you would have an uncontrollable flying condition.

I do agree with your comment on CG being off. A tail heavy plane would fly just as freeonthree has indicated.