Da Vinci Duo 2.0 Dual E3D conversion no drilling no cutting

Update: Added an E3D themed fan cover for the repurposed Da Vinci 40mm fans, also added a version of the cable chain mount that uses M3 heat sets instead of sliding in a nut.

Ok, so this is a remix of several different things all put together to provide for a drop in, no drill, no cut dual E3D extruder mount. Please refer to the original designs for other possible installation tips as most have not changed. I have loaded two designs for the backing plate and Hotend Mount. One design is a