Hey, that EK kit isn't one of those aluminum ones, is it? And/or your other 30mm rad is also aluminum? Make sure you're not mixing metals. Not trying to be condescending here, just don't wanna see you have a bad day! =)
Yeah it is the A240 Aluminum kit/Block. and the other rad is too, so should be ok. a Single 240mm is probaly enough for cpu though..but might get a gpu block later and cool something. Telling ya EK is not too shabby man, and like no one else ever really did some affordable kit's too much.