Awesome advice davejnz! I'm not sure I understand the T theory though. I will definitely use my first design and add a second set of baffles. I think I am convinced on the float switch and a top off tank as well. I'm just not sure where I'll put it...

How should I direct the flow of the overflow? Should I make the crash chamber higher then the skimmer area and direct flow that way, or enclose the crash chamber then cut some slots cut out below the water level near the input of the skimmer?

SumpTopViewRevised2 - 10 Gallon Sump

I just placed an order for two float switches on eBay...