Scratch that first idea about the overflow and returns. Here's what I've come up with now. Got most of it from here. Will it work and fit? It uses a 1 " bulkhead drilled in the bottom of the tank with a 1 1/4 " durso standpipe. I still like the sump setup and everything plus what you guys have recommended. I'm just debating about the return (Where to drill a hole for it so it doesn't siphon back into my sump but also get some flow in areas I need it). Do I drill it way up at the top? Another question, can I have a single return and then a closed loop with two outputs running off a scwd?

Anybody have any diagrams of their drilled tanks? Might be a little easier.