I realized the need to switch to using a direct extruder. But most DIY designs are bulky, while I desired something more compact and sleek. There are two ideas which have made this possible:

1. First, I adopted a rotated motor design, inspired by a motor placement on an Anycubic Kobra Pro 2. This not only reduced the size but also shifted the mass center closer to the belt attachment point.

2. Secondly, the extruder radiator fan blow air outward instead of onto the radiator.

Having been limited in space, I had doubts about the efficiency of conventional cooling, as hot air would not escape an enclosure. Thus, I sum up with the enclosure which intakes air through the hole in the carriage plate and inflates hot air in front. It will not damage your fan as the air is not hot, but warm. I have already had 12 hours prints on 245C, and it works even better than expected.

Manufacturing

During prototyping, I printed the plate with ABS and found that it was not rigid enough. Maybe PC may show better results. The final plate was cut from aluminum on a milling CNC machine. It was the first time, I used Fusion 360 CAM module and I was really exited!

You are unlikely to have problems while printing the enclosure and fan ducts.

Assembling

1. Mount the motor.
2. Install the E3D v6 and dual drive assembly.
3. Attach the lower wheel and one of the higher ones.
4. Install the enclosure.
5. Place the carriage on the rail and add the final third wheel.
6. Install all fans.
7. Complete the wiring.
8. Enjoy!

The list of components to buy:

1. E3D v6. (You can use volcano heater as well)
2. 17HS4023 stepper motor.
3. A small handful of M2 and M3 screws.
4. A dual drive feeder if your printer does not have it in stock.

In conclusion, I have enjoyed the engineering process and am delighted with the outcome. I welcome any feedback and look forward to hearing your thoughts.