Joined: Nov 2016
Gravity bleeding never did a darn thing for me either. Always just did it with the two person method. Usually a kid in the car, and you on the bleeder with a wrench, going "UP!" (up!) "Down!" (down!) and getting brake fluid in various bodily orifices it was never intended to go.
These days, they make some pretty cool little one-way bleeder thingies you can hook up, and not just spray brake fluid everywhere, by the way. Maybe I'm just a traditionalist. Maybe I've got too much brake fluid in my brain?
I'd worry about the valve after you get the air out of the rest of the system. It's probably why they suggest gravity bleed, but you could probably 'drip bleed' those things a hundred times and still have spongy brakes.