My Tiger 60 fuselage also had the banana look to it before gluing. I rubber banded all the formers in place, plus used a few clamps here and there, then placed it over the plan and used bricks to help force it straight. After that, the CA was dribbled on. The fuse came out straight as an arrow. I also have a Four Star Forty that had a crooked fuse and stayed crooked even after gluing. It still flies fine! Go figure.