+1
Based on seeing Steve's FOBO system at the rally, I purchased my own set from WingStuff and installed them last week. So far so good. It's really convenient to have the big graphic display on my phone. My units are mounted on 90-degree steel valves... but I've got t-valves in my shopping cart at WingStuff.
Thanks, Steve! (Like I don't have other things to spend $ on!)