Not a formal one, but people are promising me videos. On a more local (if "local" means anything on the internet) note, @FronTowardEnemy has my personal Venus X and will be trying it out and passing along some comments. I understand $500 is a solid chunk of change for something you can't go down to the local store and try out first, and I've had a number of people explicitly say they're very interested but hesitant to pull the trigger until they hear more reviews/demos/videos first. I get it, and I'm working on it.
Flat is 0-10-0 on the Fender stacks I use. Personally I favor more of a scoop, 5-10-5 is my go-to, but taste is subjective.