Wanhao Duplicator i3 X-Belt Tensioner

Untested, need to find the time to get the hardware but I see belt tensioners mentioned often and I wanted to try and make one for the Duplicator i3's X-Axis. My idea is to sort of losely pretension the belt and then pull it tight with the m3 bot/nut section that slides along the slot. As I said this is untested, so I will be updating it as I go. Looking at the bottom of the printer, if this works for the X-Axis I think it should also work for the bottom as it seems to have the same mounting