Coming along nicely! The new tank and placement looks awesome. Are you planning on extending the rock wall that is going to cover the side pane with the overflow a little bit around the corner and onto the back pane and then have it trail off into your main scape? or will you just be placing it on the one side pane? I really like the idea of going a round the corner a little bit and trailing down on an angle with the piece getting gradually larger or sticking out from the wall more as it comes down. If that makes any sense at all.
Either way I'm looking forward to seeing how it turns out.