I've bought a metal carriage at reprapworld (http://reprapworld.com/?products_details&products_id=599&cPath=1616_1668). Its pretty shiny!

Since it's still in a v1.0 and originally designed with mendelmax in mind, I've run into some problems with the mounting of the belt. The parts available on the webshop (aluminium clamps) can only be used if the carriage is horizontal, instead of vertical (as is the i3 design).

I couldn't find any ready to fit solutions for the mounting of the belt. So here is a simple creation, that ought to work. It's not tested yet!

• Created for a t2.5 belt,
  
• uses 2 M3 bolts,
  
• mounting point separation 50mm.
  

NOTE: The metal carriage has a x-axis separation of 50mm. If you order one of these puppies for a Prusa I3, you're bound to need new x-ends! Prints those before ripping your precious apart.

Update: uploaded proper orientation. The cold end is claiming some screw-holes. So it's ment to be used for the upper part of the belt. Designed upside down for reasons. :P

Solidworks part added for tinkerers. Not fully defined because I hate figuring out what relation is messing with my tinkering..