After playing around with a measuring dial for the bed leveling, I found that the most unstable movement of my Anet A8 was when I touched the control buttons. So I made some reinforcement for it :-)
Extra material: 1 meter threaded rod M6 (or 40" 1/4" unc) with washers and nuts.
Update: per request added a version for 8 mm threaded rod.
Update Jan_2018: per request added a version for 10 mm threaded rod with 6 mm diagonals