To add to my previous post, I saw you said you were thinking about reverting to a dual chamber design, I obviously like the decision, I think everything depends on what you want this case to be primarily suited for.
If we're assuming it is supposed to solely appeal to custom water-cooling people then the 360 rad makes sense but if you're going for max flexibility then I guess a 240 rad makes more sense, moving it to the back into the dual chamber along with the psu should also alleviate most of the problems with cables as they could be neatly tucked away there. The 240 rad could also be used for just the CPU loop if someone wanted to go that way.
Keep up the good work, looking forward to your design, hopefully you won't keep us waiting for too long