Easy Fit i3 z-axis anti wobble

Made for my CTC i3 clone.
Its was a cheap diy kit printer and came with basic 8mm threaded rod for the z-axis.
To start with I was happy with the prints from this cheap printer, but over time I wanted to improve it. but sticking to the cheap and easy method.
I was getting a lot of wobble on my z-axis... so decided to upgrade the rods to 8mm lead screws... but before that.... I'd go cheap (the lead screws are cheap enough anyway!)

By separating the threaded drive nut from the z-axis assemb