Small status update:
Last week was pretty awful in all departments; but I'll keep to the stuff relevant to the build.
I took all the components down to the factory to use the air compressor. My room gets very dusty and anything left out overnight will be covered in dust by morning.
So I clean everything up using the compressed air, and eventually reach the last component I'm cleaning - the CPU. Suddenly, water.
Water got into the air supply and soaked the CPU.
When I got it home, I dunked it in a glass full of rice and let it sit for the day, while I put the rest of the loop together. That went well, but then I had to put the CPU back in, so I removed the pipes connecting to the CPU block: the inlet coming from the RS240, and the outlet going to the RX120. After putting the block on, I noticed there was water all over the ATX connector and components surrounding it. The RX120 had some water in it from the last time I used it, which dripped down the pipe and onto the motherboard.
Bad enough, but whatever. I can deal with it later. Continue onwards with leak testing.
The loop is fully assembled and ready for testing. I begin pouring water into the reservoir, and it flows through the loop. First stop: RS240. Second stop: CPU block.
Third stop: RX120, and all over the graphics card underneath it.
Yep - the screws went in too deep and broke the heatpipes, causing it to leak the moment water got to it. While I have nothing but high praises for XSPC customer support, whoever designed the radiator so that the heatpipes are directly below the screw holes, as opposed to having harmless fins under them instead, was the subject of my anger for several hours.
I decided to give up. This whole debacle wasn't the only thing that went wrong for me last week and I'd had enough, so I took a break from it all before I do something I can't fix.
I took the motherboard out of a tray of rice earlier this afternoon, and the graphics card is in there now. My new RX120 should be arriving in the morning, along with a bonus Scythe Gentle Typhoon 4250RPM fan that I bought just for the hell of it and shorter screws.