So this was my first custom loop, i only used AiO's back in the day.

So normally this wont fit at all in the case because of the following points.

1. ATX Mainboards cant fit in the case if you want a top radiator
2. ATX PSU's wont fit at all in this case because it was only made for max. SFX-L

So i used 20mm offset metal plates for the top rad to move all the way to the glas window. This gave me the space to fit the ATX Board with the RAM.
I was lucky that the rad also cleared the PSU and its Bracket.
The bracket it a coolermaster PSU bracket for another coolermaster case.
I bought a 90° angled power cabel for the PSU, that sits on top of it.
This made it possible to move the PSU further up the case, so that i can fit the FLT120 with D5 under the PSU and not bending the cables over their limits.
i also got lucky that the D5 Pump can sit in the back chamber of the case, otherwise i could not have fitted the EK Fittings into the FLT120, because the bottom rad would be in the way.
the bottom clearance with the vertical GPU mount from lianli is 60mm so you can fit a 30mm rad with 25mm fans under it.

BUT i need to admit that 2 360mm rads with the corsair fans arent enough to proper cool the system.
A 5950x and a overclocked Strix 3090 are too much for this little loop.
Further i would say that the corsair fans have to low static pressure and RPM.
The AL120's from lianli would perform better imo.

I would've upgraded to a 60mm thick alphacool white rad at the top, but its 124mm wide and i only got 120mm space to the PSU, the corsair rad is exact 120mm wide.

i needed to limit the cpu at 70°C, otherwise the system would heat up so much that the GPU would not be cooled proper anymore.
since im gaming in 4k i dont need the CPU to ran at max performance, but the GPU should.