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Hmm sounds odd, I use to have a swallow but it was so uncomfortable and not actually that light, I used it to commute but after about 6 months it offered no support!! It didn't look that great either, it was too long, I sold it and bought a Team Pro Classic. a lot more comfortable and really minimal.
Really clever!
http://www.dezeen.com/2014/03/26/paul-cocksedge-double-o-circular-bicycle-lights/