A very good review of Trackmaster was published by Clinton Racing. Team principal Steve Clinton provided a writeup of his experience using Trackmaster at a race at Portland Raceway. He was impressed with the accuracy of Trackmaster. He was within 0.05 seconds of his AMB transponder times!
Check it out:
Review on ICSCC ForumsYou can also follow his racing action on Twitter:
http://twitter.com/ClintonRacing
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