rafters are not moved over perlins ( fixed on 4 inch's, no signs of moving), and the perlins are not bent(from load) both sides, bent/sagged are only from perlins to ridge board and only in the middle of the roof itself .
monday i will try what Simplysimon and Russell griffiths recommends and i will update this post with results, the goal is bring it at least half way back to initial position and stop from future sagging.
thank you all