120mm auxiliary cooling fan mount on the gantry by auroratechchannel

120mm auxiliary cooling fan mount on the gantry, as shown on my BTT Pad7/CB1 Ender-3 upgrade YouTube video: https://youtu.be/8vkzpvia4mg After releasing the video, I made additional modifications by replacing the 4020 blower with a 5015 blower and installing a new fan duct. Through experimentation and printing over a dozen prototypes, I discovered that when printing at high speeds, positioning the blower slightly farther away and at a downward angle produces better results compared to blowing directly at the nozzle from a close distance. As a result, the unconventional design of the 5015 fan duct effectively achieves the desired outcome. With this setup, I am now able to print at speeds ranging from 150mms to 250mm/s(depending on the model size) using solely the 5015 blower.

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