Weather was dead calm, under 3 mph where I launched, water a mirror, I was flitting around in P mode, stopping in hover for a maybe a minute to take a mid-lake pano, but otherwise I was flying near full stick P speeds, ~20 mph or so between points of interest, and in looking closer at the flight I did go to Sport mode for three minutes during the flight. So I probably could get an extra minute or two if I kept speeds down to 15 mph.
I have another 22:05m flight that went 100% to 22%, spent mostly in Tripod, that'd yield 28 minutes to zero.
