So, I'm running a small printer (Printrbot Metal Simple) and have been really interested in E3D's new color-switching hotend.
http://e3d-online.com/Multi-Extrusion/Cyclops-MO
Reducing ooze, light weight print head, maintaining available build space, all good things on a small machine. I know my printrbot would require a second stepper driver (there's an expansion board available), but I'm wondering if S3D would have the tools to print from two extruders through one hotend.