Thanks for your input.
I am sure that the wing does have incidence. I calculated it to be around 2.5 degrees. It is not shown in the scale drawings but the other important bits are shown. I am mostly after the effects of having 4 degrees engine inlination and 1.5 degrees elevator stab offset on an r/c plane. Bear in mind that the original plane does not have any problems to fly!

Reuben