Got my case! Loving it so far but I'm very confused. How do I get the top grate off so I can mount the top rad? Im sure this has been mentioned before but if someone can point it out with a picture I'd be grateful!
I'll tell you the easy way. Unscrew the top of the frame from the rear of the frame and the front of the frame (note i didn't say front panel) by removing 6 screws (2 front, 2 rear, 1 top left rear, 1 top right rear). To access the top rear screws, take off the side panels. To reach the front frame screws, take off the front panel cover like how you took off the side panels.
Once you take out the screws, you should be able to lift the top of the frame off. Note: the rear screw holes are extended, so you'll have to wiggle the top frame forward and up.
After that, focus on the top panel. There's 4 screws, take them out. Now that metal bracket inside that top frame, you can wiggle it out. It takes some muscle as it's tight. Once you get it out, mount the rad. Remember the orientation of the metal bracket. Also, when you mount the rad, mount it as far to the rear as you can, so you avoid the ball studs of the side panels. Or, if you're trying to fit the H115i series, apparently if you center it properly, they will fit ( I didn't bother trying and just returned mine for an NZXT x62). If you're mount a regular rad then rear most is preferred.
There isn't much more detail you need than that. The part for me that made it not fit was the placement of the radiator in the bracket. Physically, the radiator fits just fine. The trick is just to align things so that it fits, then put the screws in... I'd recommend starting with the middle 4 screws, adjust things where it looks like it'll work then give it a try.
Here are more pics
How much gap are we talking about between the ball studs and the radiator? I guess the previous folks didn't really try to line it up evenly as much as possible like you.