Anet A8 X Carriage dual extruder stock and e3d

I reworked this design to work better as I found some issues with version 1 (namely cooling of the extruder motor and heat retention in general causing warping of the carriage.
I wanted a carriage that would dual nozzles. I wanted to keep the stock direct extruder which works well with flexible filament and to keep weight down I went with e3d and a remote extruder. I designed z probe sensors (18mm) to mount on the side closer to the nozzle tips for easier bed leveling.
The e3d can be adjusted