I wanted to keep the configuration consistent with the piaware sd-card.
So i chose this configuration.
It is different from yours but it is correct.
And airspy really doesn’t care if it needs to provide the data via one or two ways.
You can either have a daisy chain where the data goes to dump1090 then to piaware.
Or you provide the data to dump1090 via 30104 as a push client and provide piaware the data via listening on 30005.
The push client only method does not work with the piaware sd-card image and i wanted to have a single airspy configuration for my HOWTO 
You might want to add to this information that it won’t work with the piaware sd-card image.
Feel free to copy my HOWTO to your web page after testing/verifying it