https://www.youtube.com/watch?v=N7rqlNrCuq0&feature=youtu.be
http://www.youtube.com/watch?v=N7rqlNrCuq0
Is it flexible like other nylon?
Yes, it is flexible. That was my first and only print so I don’t have much experience with it.
Nice vase. 
Have you tried Taulman filament yet? I’ve heard bad things about fumes from the additives in trimmer line but have no first hand experience.
I have some but have not tried it yet. You can keep the fumes down by extruding at 240C.