Anet A8, X-belt tensioner

Made this belt tensioner for the X-belt, no need for a longer belt to add this item. things needed 1x M4 nut,1x M4 screw 40 mm long, optional a washer and a spring. My Anet A8 came with extra springs in the package same type for the heated bed i have used one of them a slightly stiffer spring would be better..