Solidoodle SD4 ballscrew/nut adapter

An adapter for a ballscrew and nut bought at aliexpress (SFU 1204-3), which makes it easy to mount on the existing aluminum bed. I paid 19 USD + shipping for the screw and nut, including custom milling of the ends to 8mm. Easily worth it :)
bought from this vendor: http://www.aliexpress.com/store/920371

The only downside to this mod is slightly decreased maximum print height, as the adapter adds 6mm on top of the bed compared to mounting the ballscrew directly.