I'm planning on creating an aluminum cube-like enclosure to house some water cooling equipment. I've been reading through some of the scratch build logs and have a decent idea of what I want. However the one thing that has been nagging me is if I made a frame from aluminum angles, and cover it with either plexi of aluminum sheets they won't be flush since the angles will be rivetted like this: Is there any solution to this? Or should I use square aluminum tubes instead? And the last question is can a bracket made from aluminum angles handle the weight of a mcr320 radiator when it's full? Thanks.