ErikZalm/Marlin — pull request #575 by buildrob101 (2013-08-07 14:21:30+00:00)
Title: Add duplication and auto-park mode for dual x-carriage support.

Duplication mode seems to be of interest to a number of people (Video can be seen here: http://www.thingiverse.com/thing:115885 ). Auto-park mode is needed to allow dual x-carriage operation with current slicers but Full Control mode is still the default mode.