Haha you should see my Casey cut after 25 days of plain water, nannas everywhere but never a seed.....i find almost everything will throw nannas if you flush them hard enough, i managed it with the Original UK Exodus Cheese after 10 weeks flower with 25 day flush.
Peace
I usually flush my cgs girls for at least 14 days now and the one strain tends to throw quite a few nanners also... never any seeds though. We also let the girls go a bit longer than recommended, so that may also contribute?
casey jones is a strain that throws nanners no matter what, but i have found that they are sterile....