M2 Dual Extruder for M2 and E3D

This is my latest design for a dual extruder for my M2. This time I designed it for the E3D V6 hotend. I wanted the ability to use the continuous PTFE tube from the drive gear to the hotzone of the E3D. I am hoping this helps me print flexible filament better. I was hoping to reduce the weight by moving one of the extruders off the gantry as a Bowden.
I did not like the idea of bolting the e3d in from the bottom so I designed this split arrangement.
The benefit I see in this design is that;