Gather the necessary tools. You'll need:
1x - 1.5mm hex driver
1x - 2.5mm hex driver
1x - M5 heat set insert
8x - M3 heatset insert
4x - M3x25 screws
4x - M3 washers
4x - M4x20 SHCS bolts
4x - M4 hex nuts
4x - M4 nuts
1x - M5x14 bolt with thumbscrew cap
2x - Budaschnozzle with .35mm nozzle
2x - Wades extruder for dual (see extruder assembly instructions, and use shortened hobbed bolt and low profile stepper)
Using a soldering iron, install heatset inserts into:
-the 4 holes in the bottom of the extruder mount (m3 heatset)
-the 4 holes on either side of the flex plate (m3 heatsets)
-the single hole on the top of the lower bracket (m5 heatset)
Make sure that the tops of the inserts are flush with the surface
Install the 2 budaschnozzles in the flex plate as shown, with the wires comming out in the center facing each other.
Next, install the 2 wades extruder assemblies on top of the budashnozzles, with the gears facing out. Fasten with M4x20 botts and m4 nuts. Don't tighten all the way just yet.
Feed a piece of filament into each extruder to line it up with the budaschnozzle, then tighten down all the way.