Need help with overflow in new tank

[MsBeanCtr]

I thought I would get exactly the size tank I wanted this time around so I'm having one made. Even though it will be a small tank (just over 30 gallons) I want to run a small sump to hide the skimmer etc. So, my last few tanks were already pre-drilled and I just filled them up and went......with this new tank, I have to give the designers some specific info....which I'm finding is a little out of my league. I'm thinking I'd just go with something like this?

Thoughts

 

[ccejka]

If there is room I would recommend an emergency drain. It's something you don't appreciate until it comes time that you need it.