Hi chris here ,0 incedence bottom,-1 to 2 deg top wing,2 degrees elevator would seem about right.I checked my aeromaster kit and thats what they are on that airplane.The reason for negative upper wing is so that it stalls after the bottom wing does.On a aeromaster I had years ago you could see the advantage of + stab during flight it would fly slightly tail high.Anyway thanx For all the info it will be of a lot help in the repair of the airplane thanx Chris