Problem with cuban link lining up straight

Hello all, I just put together a nice Cuban link chain heavy and just twisted it. But cannot get it to line up straight every time I hold it up from one end it twist in a spiral at the bottom. Can anyone offer any suggestions on how to correct this or will the links line up straight once i file it down?

I’ve heard it’s good to run it through the rolling mill a bit. But get more advice.

You might try a hydraulic press to flatten rather than a rolling mill.