Anycubic I3 Mega belt tensioner

Because the tiewraps didnt work, i designed a belt tensioner for the Anycubic I3 Mega. Just 2 parts, roughly 19 min to print on my Anycubic and just 2 m3 bolts and 2 self securing nuts (or 4 nuts) are needed. I used m3 x 25mm bolts because it is easier to tension the belt if they are a little longer than needed. But m3 x 20/16 will do the job too.

Edit 23-1-2018: i re-designed it a bit (5 mm longer on both sides and 1 mm thicker, Use also self securing nuts, locktite or 2x2 nuts because they