LM8UU Z-axis cupcake rider 5 parts only

**Note this has been modified**
Using this in 2 axis means the z-stage can become stuck and rise unevenly in the diagonal accross the platform due the the LM8UU not rising at the same time. i put this down to the flexibility of the acrylic axis and that the off centre weight of the printed stepper extruder means uneven forces act differntly on each axis.
Therefore i recomend only fitting one axis to limit motion and using the z-wobble arrester on the opposing corner.
Video - http://www.youtub