This is a model I put together for a new corexy printer I am designing. Main points were
-i wanted it to use a compatible bolt pattern to existing printers like the Tech2C hypercube I have built, which I believe is the same bolt spacing as a prusa i3.
-to use a radial fan as they are more effective at pushing air under some pressure (like through duct work)
-print fan to distribute airflow from all directions to ensure more effective cooling
-to ensure that the printed work is not hidden by the print fan ducting
-ability to mount inductive sensor
-reuse existing parts if possible
Basically to assemble you need to
-mount the main plate to the carriage first
-insert the funnel for the radial fan
-insert the duct, fix in place using self tapping screws
-bolt on your titan extruder
-fit the inductive sensor
-and finally fit the radial fan.