I'm thinking of doing a build like this
From what I can see, my only option is to fill it from the top rad and allow that to flow into the res.
However that only works if I can actually access the top fill port of the rad after it's been mounted into a case.
While it works, it isn't a very elegant solution and I'm also a bit concerned about potential spillage if I fill from up there.
Anyways,I want to get u guy's opinion and see if there's a better solution