After growing sick and tires of taking my lights off my bike every time I locked it in the city, I designed built a flashing rear light directly into my seatpost. Besides the practical aspect of having non removable lights on the bike the new design is much more elegent and minimal. Gone is the angular ad-hock plastic appendage! The integral design also makes it easier to lift the bike by the seatpost or hold in in a bike stand.
I'm planning to have a production model available by the end of the summmer (2005), but in the mean time can build them by hand for a slightly higher cost. If you are interseted in having one fabricated for your bike, please contact sales@cyceltek.ca