Is your sump a stock tank to which you've added baffles, or is it a custom sump? How many gallons is it? It doesn't quite look like a 40b, but it fits in your stand like a glove!
The tank is a petco special 40b. I found a 4'x8' sheet of cast acrylic on Craigslist and cut the baffles myself, if u scroll down on the 1st page u can see all the pieces I cut and how I installed them