After roughly 2 months of using the R1, I realize how useful a dual extruder would be - especially for printing support material, and for combining rigid and flexible material in a single print. Now, I'm aware of Mike's dual bowden extruder mod, but at the same time, I'm reluctant to go "full bowden" - especially since I need to print a lot of flexible material like NinjaFlex, Flex EcoPLA or Flex-PolyEster... And while these are already tricky to print with a direct extruder (I only managed to print them at all after upgrading to the E3D V6 hotend), from what I've read, they're near to impossible to print with a bowden extruder. Therefore... I'm pretty happy with my direct Wade's extruder, and would like to keep it that way. At the same time, I realize that adding a second Wade's extruder side-by-side to the RoBo3d R1's carriage would significantly reduce the x-travel, leading to a much smaller build size in the x direction. But how about placing two direct extruders in front of each other (along the y axis)? Or a mixed setup, with the standard direct extruder, and an additional bowden extruder? I haven't been able to find anything online regarding a dual extruder setup for the RoBo (aside from Mike's dual bowden), so I wonder if anyone else has already ventured into this direction? Any thoughts, ideas or suggestions?