3DR CARRIAGE AND MICRO FOR MAGNETIC JOINTS

I decided to make richrap 3dr printer model, then I thought will be great use magnetic ball joints instead traxxas universal joints, with this I hope we can minimize the backlash hopefully eliminated
I bought magnetic ball joint KD310 and to use it I adapted the design using as guide the richrap concept.
Also I used for the carriage autolubricated bronze bushings much cheaper than bearings and work nice
http://www.youtube.com/watch?v=IrokVC3y7QM