My bike's seat clamp lug recently failed. Imagine what might happen to an 80g carbon saddle, if your seat clamp or seatpost bolt fails during a ride. You weigh > 200 lbs and suddenly, your saddle comes crashing down onto the top tube of the bike. now imagine the outcome if you have one of these ultra-thin saddles and some really, really, really fancy set lugs :
http://www.bikelugs.com/
Ouch !!
- Don Gillies
San Diego, CA