this is a very good ats build write up. I noticed your screen was much finer than the one i had, and it consisted of two layers. another difference is room in the sump, I'm working with a 20 gallon hex, whilst you have a 55. I may consider to do a screen if I ever build a larger tank, but its just not practical in my current system.
I have been toying with the idea of algae filtration in a cold water set up i've been planning for a while. It may be very beneficial there since feeding and consequently nitrate build-up would be heavy. It could reduce the need for frequent (2-3 times a week) WC.