52mm ID Spindle Mount for MPCNC (25mm version)

Looking through thingiverse for a mount for my Chinese 500W spindle I found that none have ventilation holes for the air to pass through. I mean, the fan on top of the spindle pushes air down over the motor, but with all the mounts I've seen the mounting bracket acts like a barrier for the airflow. It didn't and still doesn't seem very thought-through to me so I created my own.

It uses 4 M4x20 or M4x25 to mount to the MPCNC tool holder and 1 M4x25 to tighten the grasp on the spindle.

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