To give you some updates on the development progress. Here is CAD screenshot. Maybe you can see some new internal features.
So far, so good. I see you're designing with an exhaust fan configuration for the AIO pump but I hope you won't neglect to do intake testing as well. The ideal should always be to intake fresh air from a purely technical perspective (colder air will transfer more heat to it versus just trying to push out hot air).
Plus it will guarantee a positive pressure setup which is always good.