I dremelled the case to get in my 360mm rad in the rear.
I would like to see the other side of this ? how you got the barbs through ? did you cut the case to get them through, I was thinking of doing this myself to my case, then I could get a 360mm in the top instead of a 240mm, the restriction at the moment is the barbs stopping me from putting a 360mm in the top, the other issue with how you have it, is you cant have push pull on the fans.
I took my hard drive cage out as I only have 1 x3.5mm hard drive, I screwed it to the back of the cable hiding bracket thingy !, only had to modify that a bit due to the length of my PSU, I could get the hard drive in with no problem, but couldnt get the power cable in, so had to slide the hard drive up slightly to the bigger holes and use some washers to stop the screws from falling through, even then, the power connector for the drive is beyond a tight fit, I wanted to get rid of the cage because of all these damn corsair RGB and fan controller boxes, I had wires everywhere, so just ended up sticking them to the back out of the way, still looks a bit of a mess, but better than it was, 2 sets of wires going to different junction boxes for every fan, that 8 fans, 16 sets of wires, I ended up making them into looms just using some electrical tape and trying to keep them away from the back of the motherboard.