Serkan,
good progress on the wing.
A couple of things: I would post instead on the Warbird forum thread, since they may be more people with questions and answers about large scale warbirds.
http://www.rcuniverse.com/forum/rc-w...ta-152-h1.html
That is were the original prototype build was posted.

Also, you suppose to put together the wing and wing wing joiner box while flat on the table if I remember correctly.
Thank you for posting,
JG