it would nevergo out of line as the arm wouldnt travel far enough back for the bolt to leave the back of the body....otherwise it would destroy itself....
the back block doesnt actually touch the bottom tube, it just looks like it does, the bolt and the vertical pin hold it in the right place and stop any movement
the back block doesnt actually touch the bottom tube, it just looks like it does, the bolt and the vertical pin hold it in the right place and stop any movement