I have a beanimal on a 210g. If I were you, I would extend the overflow box across the whole side of your tank, I'm not sure if you have already done that, but you might have.
If not, there'll be dead spots on the two sides.
Also, you might want to shorten the distance from top of overflow down to bottom of overflow, it lessen the splash noises.
Those are my main gripes about my system which I think its important to anyone building a bean/overflow.