Ultimaker Original LM6LUU replacement with linear copper bashing

It's upgrade and replacement of LM6LUU bearings in printing head to linear copper bashing for much better precision of printing and elimination of play printing head.
Here you can find used linear bashing (6x10x15 mm JDB Graphite Lubricating Brass Bearing) which was ordered here: http://stores.ebay.com/legtin/

Also you can see difference on video - before and after:
before upgrade: https://www.youtube.com/watch?v=rE_j6EljLyk
after upgrade: https://www.youtube.com/watch?v=5KpONVoyd-w