Okay nobody do this
Failed idea
Discussion
Maybe higher static pressure fans would work better for your application?
It shows higher static pressure than the Noctua A4x20 and higher airflow, but the shroud probably changes all that
Check out fans that people who watercool PCs use, it can be a good starting point.
I totally love that you did this, reminds me of the stuff I did when venturing into watercooling 🤙