Your opinions on my sump design

[rocketlily]

I've designed the sump to fit under a 99 gal corner tank. With it being in a corner, space is very limited. I've attached a picture of the design I've come up with. Water would enter from the tank into the skimmer section and go to the return area over and under baffles. Water would enter and exit the refugium section from both the skimmer and return area via holes or slots in the acrylic. Each section is approx 11 gal. with the total being around 33 gal. I plan to build the complete sump out of 3/8" acrylic. Height would be 18".

Could I please have your opinions about what is right and what is wrong with the design.

Thank you