bumpy green wouldn't wait for the perfect day, you'd just shoot the first bit of prophang you get. look at my videos, it's not until many months after having my Cougar that i do get a windless day, we're not all down in the stagnant air of the med.
tell you what i'll try and get a play on the one here, but i'm pretty sure it'll prophang ok, just a bit different to the high wing Cougar i'm used to as it's low wing.