Link RemovedI did about two years ago of the FX72. WARNING: SHAMELESS TOOL CONTENT FOR A LOT OF THIS CLIP
The settings aren't too extreme here, but definitely some good flange going on. I think it keeps great low-end (although a lot of this clip is up on the D and G strings).
thanks and yep, it keeps low end well because the flange sweep is confined to the upper range, like the BF-2B (which it reminds me of a lot)

There are times when that isn't what I want (most of the times in fact) I think the BF-2 sounds better than the BF-2B with bass, though.