FishyFishy!'s 155 bowfront fishroom/closet build

[FishyFishy!]

So I need some advice on my overflow setup. This thing came stock with 1 X 3/4" bulkhead and 1 X 1" bulkhead in each overflow. So it was a Durso setup and the 3/4" was probably for a return line.

So with the difference in the hole size, should I just go with the Durso setup? I've had them before and just find them a little noisey. However it did come with a brand new set of durso pipes I can use. I would love to do a herbie, but with the different sized holes, It would be sketchy to have a 1" main and a 3/4" emergency...no?

I'm also having trouble with the layout of the sumps as well. I was going to stack them one on top of another, but now it's not looking like I will have the room to stack them all. So I think I'm going to have to re-design the whole thing :-(