Some very nice scores, and some quite different approaches.
I declare ioncorpse the winner with a score of 2884. Although he has designated it as dark, the initial movement of the right-hand metal bar is quite minor (I did initially say best score wins, and using AR2 was intended to eliminate light/dark distinctions - a little more work to do, but I will get there!).
I liked the welding on the left hand metal bars in ioncorpse's 2884 Dark - minimalistic!
And I particularly liked Votart's 2810 First solution - good re-use!