[ZapWizard]

I don't think i would cut any channels like that for a few reasons.

A: There will be little airflow inside this case
B: The copper cap would be hard to seal with soo much cut areas

As far as the maze, it would cut down on overall flow rates.

I am not terribly concerened about performance, but rather noise.
If I can get a performance boost, well then that is just bonus.