Poltur XL X-axis mod

direct replacement for current prusa i3 style x-axis on my original Poltur XL design.
http://www.thingiverse.com/thing:1792378
http://www.thingiverse.com/thing:1962561

this mod uses a 15x15 tube as appose to 8mm smooth rods typically used.

over the last few days of use it has displayed numerous benefits over the original i3 setup I used.

quieter (so late night prints are a go now)

faster (doesn't suffer with vibes so Ive been able to increase movement speed and reduce overall print