Ender3 v2 Direct Drive with BondTech BMG & e3D V6 & BLTouch and cable chain

I use original parts but I think it will work with clones :

• BondTech BMG extruder
• BondTech NEMA17 Pancake Stepper 25mm (The Creality stepper is to big)
• e3D V6 hotend
• BLTouch v3.1

I've updated the design so it is easier to print and have a better cooling airflow,
and add the possibility to use the cable chain designed by Ilueen.

For the cable chains :
From base to old extruder motor position :
1x chain-link_cut + 21x chain-link + 1x chain-link_cut

From base to plate :
15x chain-link + 1x Y_axis_chain_connector

From old extruder motor position to direct drive extruder :
1x chain-link_cut + 11x chain-link + 2x chain-link_cut

Needed extra stuff :
To fix the base on the eplate :
2x M3 washer
2x M3 4mm screw

To fix the Cable arm on the base :
1x M3 nuts
1x M3 8mm screw

To fix the Bltouch
2x M3 nuts
2x M3 6mm screw

To fix the 5015 fan on the fan duct
1x M3 nuts
1x M3 20mm screw

To fix the cable chain on old extruder motor position
3x M3 nuts
3x M3 8mm screw

To cool the hotend, I didn't used the original e3D 30 mm fan, but a 40 mm fan with the 30 to 40 mm fan adapter and this 40 mm fan guard

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After mounting this, don't forget to change the offsets.
For the nozzle :
With GCode :
M206 Y-10
M500
Or in Marlin Firmware :
#define MANUAL_Y_HOME_POS -10

!!! The offset for the BLTouch has changed from the v1 !!!
For the BLTouch :
With GCode :
M851 X-32 Y0
M500
Or in Marlin Firmware :
#define NOZZLE_TO_PROBE_OFFSET { -32, 0, 0 }

Add this line in Startup G-Code of your slicer (after the G28 ;Home) :
M420 S1 Z2 ;Enable ABL using saved Mesh and Fade Height

Change the wire cabling for the BondTech Pancake stepper : Invert pin 2 and 3 on the connector.
Before (Creality 42-40 stepper) : 1 3 2 4
After (BondTech Pancake stepper) : 1 2 3 4
Change the Vref for the extruder stepper (guide) : 0.69 V for the BondTech Pancake 25mm.
Change the number of steps for the extruder to 415 (guide)

For better performance, change the temperature sensors in Marlin firmware :
#define TEMP_SENSOR_0 5
and tune the hotend PID (guide)

Note : I set the speed of the 5015 fan at max 75%.