Anet A8 X belt holder and spring tensioner

I started to rebuild one of my Anet A8 printers and first thing to come was X belt holder and tensioner.

Apart from printed parts it require one M5x50mm bolt, one M5 lock nut and spring with OD5mm (ordinary spring used for 3d printer bed, sold usually in tens on e-bay).

To attach the belt just put it through the small rectangular hole then make a loop and press the end to the belt (teeth to teeth interleaved) then pull the other end and the belt will carry the end out while the loop stays