I'm sorry for this, but I just have to ask... Do you even know what it is you're actually talking about? Since it doesn't seem like it.
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"also "black ridge" has terrible design where fan blow air out of the case !!" "- The Black Ridge cooler has a fan. It's down to the user how it operates, intake or exhaust. Doesn't make it a terrible design.
By the way, you missed a few, very important steps in your guide:
Where and when to install the CPU?
When to install the AIO onto the motherboard?
Should the person run the AIO pump at Auto, PWM or DC mode? - Since each one has a different effect on the pump itself.
You can't install an SSD in the rear of this case, only in the front.
What you are suggesting by using a thermal pad against the case, is if the person would install an M.2 NVMe drive on the back of the motherboard. That is IF the persons motherboard even supports it in the first place.
Secondly, that isn't an SSD, it's an NVMe drive. 2 different things. An NVMe drive utilizes PCI lanes on the motherboard (which is much faster than an SSD, newer, but much more expensive) and an SSD uses SATA interface (which is much cheaper, but older and slower) - Another point to my question at the top of this post, do you even know what you're actually talking about here?
Lastly, regarding your point "than psu with painful cable management (mange each cable separately, and get a nice "corsair sf750", totally worth extra money, with their cables you not really need custom ones)" - How do you suggest the user to being able to close the side panel with the PSUs included cables, if they use an AIO? Since those cables are rather long, thick and hard to manage inside the case. Which almost has no space left to begin with.
Here's a picture for you, from another user on this forum. They use, what seems like the included cables. But with no AIO installed. Looks pretty difficult to install an AIO in there, or what do you think?:
I'll actually take a photo of my build later on today, just to show you that with custom cables, you can go a long way further than with the included cables.
Since you claim this: "with their cables you not really need custom ones".