Bike and car events are high speed low density events meaning not many people going at the same time thru a reading point. The Olympics were very very low density events.
What would be your excuse to a Race Director if your system crash and you didn't place a back-up system?
I do like the two cable system for the antenna and the ease of the lay down but all comes down to a financial decision. Figure yourself buying 15000 chips at 40 dollars that with a claimed usefull life of 3 years only. What kind of a price you would have to put for your services to have a return on the investment on three years, time that you must referbish the chips again.
I have ask this question to AMB guys at Atlanta, still waiting for the answer. How much a Race Director is willing to pay for his results?
Pedro