Yazzo Double Slider Bushing Block

Sometimes I want to play with a fast moving tool head, like the Ultimaker machine has.

This thing is the essential linear slide moving part that allows you to play with a fast light weight tool head that moves in two of the three axes.

It has a similar "bushing as bearing" design as the Yazzo Bushing Block: http://www.thingiverse.com/thing:5825

In this case though, it uses two bushings instead of just one. One for x-axis, one for y-axis. You basically just print this thing, insert bushing, slip smooth rods inside, and go from there.

The most obvious improvements to be made on this thing is to put some nice smooth transitions from block to platform, like I did on the bushing block. This one's a bit more involved for me to think about, so it might take some time. Perfect for a derivative part!

UPDATE: 27012010
Biggest change is using linear bearings.

I've changed the design somewhat. In the OpenScad file, the tool platform is separated from the simple two way bloc