Opinions/suggestions on sump design?

[thefuz]

Hello folks. I've decided to explore putting a sump together in support of my new 250 gallon display.

The sump will be located remotely from the tank in my basement. I'm currently using a 100 gallon stock tank (pictured) but I believe this configuration will result in microbubbles and doesn't currently accommodate a good spot for a refugium nor easily dealing with filter socks. Sump dimensions will likely be 41x23x25H.

As shown in the photo, I have a Beananimal triple drain coming in on the right. The drain is plumbed via schedule 80 bulkhead inside the sump on the left side. The skimmer is external (Bubble King 250) and will rest on a platform across the top of the sump.

I put together a rough design using Sketchup. Center section will be used as a refugium with dark acrylic on both sides.

Can probably go tighter on triple drain side (2" pvc here).
Not sure if I need to go wider on the filter sock deck (7" socks).
Is the spacing wide enough on the baffles?
Should the return section be wider? Initial setup will drain into a Reeflo Hammerhead but maybe I should consider space for a separate return pump in the future (not sure if the quiet DC pumps will have enough head pressure)?

Comments/suggestions? Anyone recommend a place that might be able to craft this for me? Thx!