by jameswood, published
A printable X-carriage and extruder platform for the Printrbot+, featuring an integrated fan mount.
Note that this does not include the bolt to hit the standard x end-stop switch, but works well with PolakiumEngineering's upgraded x-bridge: http://www.thingiverse.com/thing:31012
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UPDATED: The Carriage (Carriage3a_fixed.stl) has been extended by 1mm to prevent the extruder motor from touching the Z-axis smooth rod when used with the standard wooden extruder.
Print one X-Carriage and one Platform and you're good to go. The mounting nuts and bolts can be recycled from the existing laser-cut mounting. This was designed to hold the laser-cut extruder, so it should work with any other Wade's-like design.
The main motivation for moving to a printed x-carriage was that the c-clips on the bearings of my lasercut carriage were rattling!
The X-Carriage has my logo at the top of it, but you should be able to delete it from the sketchup file if you don't like awesomeness.