Attached you can find the assembly instructions and Marlin 2.1.1 firmware for this mod. This firmware is for F103 and F303 chip. If you have the last version of Kingroon, you need compiled the firmware for SMT32F4 chip (mks_robin_nano_v1_3_f4)

Link of marlin firmware

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BILL OF MATERIALS

• 1unit – Orbiter Extruder v2.0
• 1 unit- Hotend V6
  • Optional upgrade CHC hotend
  • Optional upgrade Revo Six
  • Optional upgrade V6 Volcano hotend
• 60-70 mm -- PTFE Capricorn
• 1 unit – Thermistor ATC Semitec 104GT (Only use with v6 hotend)
• 1 unit– Fan 5015 24V
• 1 unit – Fan 4010 24V
• 6 units – Screw DIN 7380 M3x8
• 2 units – Screw DIN 7380 M3x12
• 5 units – Screw DIN 7380 M3x16
• 3 units – Screw DIN 7380 M3x20
• 2 units – Screw DIN 7380 M3x25
• 3 units -- Self-Locking Cable Ties 2,5x100 mm 

Optional:

• 1 m – Cable Sleeve Self Closing PET 13mm
• 1 unit –Inductive sensor M8
• 1 unit – 3DTouch 
• 1 unit  - Adxl345 Accelerometer

Version Heat Inserts:

• 14 units – Insert Nuts M3xD4.6xL4.0