Mike Kelly's Dual Bowden E3Dv5 RoBo 3D X Carriage Mod

**Note: this version is old and out of date. It will require additional work to use with the E3Dv6. Use my modular carriage instead**
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What this is:
Converts the stock RoBo 3D printer with a single direct feed extruder and replaces it with dual bowden extruder with no loss in x travel. This is just the x-carriage as the cold end will be released separately

Background:

I have designed and fabricated, with the help of tessarect, a dual extruder upgrade to the RoBo