Prusa i3 Mk2 X Axis Tensioner

Heres a simple to print and use Prusa i3 mk2 x axis tensioner, it requires a 624zz bearing and a M4 x 18 or 20 screw and nut for the bearing, it also has 2 positions for 2 M4 captive nuts and M4 screws (required length over 20mm) to allow for belt tension adjustment.

It puts tension on the end of the X axis rods so not to bend the Z axis smooth rods.