For the DIY printer, prusa i3 copy.
Adds a bearing to the Z Axis and strengthens it all up.
Uses standard abec skateboard bearings, cheapest going, contact me if you want some cheap ones ! :)
Wrap a little bit of tape around the top of the threaded rods to make it a interference fit so theres no play.
Who ever knows what this printer is actually called, please let me know ! :)