parts fan / layer fan duct for Peter Stoneham mount on rigidbot

This is a mount and a duct for Peter Stoneham's dual extruder. It is my first design and a little wobbly but it is functional.

You need a centrifugal fan for it. Link to the fan is below.

Rotate the support arm 90 degrees to lay it down for better printing. The fan duct needs supports over the inlet mouth, i just put 2 to help with bridging and over the 2 arms that hang over.

I used 2x M4 30 mm bolts and washers to mount the fan to the arm/duct. The arm is mounted to one of the linear