Inspired by some videos I decided to add one more show element to the the indoor kiting some of the time. I therefore made streamers from a metallized mylar film rescue blanket. I found that the 2cm (0.8inch) wide 6.3m (21foot) long streamer was a good trade off. The tail also found another use when a RC-piloting father-and-son borrowed it.
More reading in https://kitelife.com/forum/blogs/entry/350-attending-indoor-model-aircraft-events-–-the-setting-of-a-goal-with-a-deadline/ .