Adding some in progress shots of my own here. As others have noted micro 90 degree fittings are your friend here, and every millimeter counts.
After a ton of trial and error, and almost settling on a loop with an FLT80 reservoir at the top, I ended up going with a compact bottom mounted DDC combo. Draining and filling with the FLT was way too involved and the degree of tilting the case around felt like an accident waiting to happen.
Some other notes:
The GPU top seemed to sag outwards in my build, this started happening after I changed the layout to reduce the size of the motherboard half of the case. I ended up fixing this by using a screw to lock the GPU IO plate at the bottom, and a few washers to slightly tilt the PCIe extender bracket to account for the sag.
The space between the radiators and the PSU bracket is very tight once fittings are added, both with the 20mm slims that I ended up with and the original 30mm thick ones that I started off with.
I‘m much happier overall changing my pump res combo and going with the thinner 20mm rads, those two changes made a huge difference and gave me loads of space to work with for tubing and cable management.
Please don’t judge the random clear piece of tubing, I ran out of thick fittings in time for the leak test