You could email Carl Goldberg and ask what the incidences and thrust angles should be. That way you would be working with facts instead of assumptions.
[email protected]
or better yet
http://www.carlgoldbergproducts.com/tiger2.htm
wing and tail are 0 degrees and engine should be 2 degrees right and 0 down.
CG is 3-1/2 to 4-3/8 from leading edge of wing.