Raise3D Cold End Fan Duct 40 mm

The Stock 35 mm fans on the Raise3D printers are quite noisy, so I replaced them with 40 mm fans. This has reduced the noise to a tolerable level.

These fan ducts replace the stock fan ducts, and are mounted in the same way.
There are mounting holes in the extruder block to allow this without any modifications.
Cover is provided to stop airflow to the printbed when printing with filaments like ABS