i stand corrected

I hate to admit when I'm wrong...it sucks. Well, I was wrong about the my sensor calibration. Yesterday I went for a 4 mile run that I used weekly when I was training for the Chicago marathon years ago. I measured the run with my car originally and it was damn-near 4 miles - good enough for what I needed. Well with the help of the USATF website and Google maps I've measured it to be 4.01 miles. Well when I finished my run checked the sensor reading sure enough it read 4.03 miles. I guess the calibration was pretty accurate after-all. Now I can trust the sensor and forget about worrying how off my mileage is going to be.