I like it. I need to figure out how to model the duct part. I would like your ducts but with my fan placement.
I have figured out that I rarely use the gear for any type of filament operations. so access to it is not an issue. I want to be able to use my existing BL Touch mount but have the fan not stick up that far.
You should also change to my new H2 carriage. Brings the extruder in closer to the rail and WAY less flex.