Nope, that filter is in the bottom drawer of my toolbox collecting dust. I wish the dual pump system had it as an option instead of included, I'd have skipped it and saved the bucks.
I get my E85 exclusively from Speedway here in town. I've checked 4 different stations and the E85 is always clear as water, so I've never seen a reason to install it, and worry it's an added restriction.