Mingda d2 Cooling system

## Annotation:

This is a **remix** of https://www.thingiverse.com/thing:4659128

After reassembly (to make everything right, not like from the factory), the distance between the nozzle and the extruder has become smaller, so the easiest way to set the 4020 blower in the correct position relative to the nozzle is to raise the blower a couple of millimeters without changing the base model.

I missed a little with the upper right hole of the blower attachment, but in the end it was not useful to me, so I did not change it. I am attaching the original model so you can fix it yourself if you want to.

## Print Settings:
* perimeters - 50mm/s
* small perimeters - 25 mm/s
* infill - 50 mm/s
* top - 30 mm/s
* first layer - 20 mm/s
* bridges - 25 mm/s
* accelerations - 800 mm/s^2