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#53367

Larry Hayashigawa
Participant

Carl,

If you are serious about collecting good usable data don’t buy the GPS and buy the e-Box, a bit more but you can find them used.  The e-Box is more complicated to install and get operational but it’s worth it because the data is much more stable because the GPS data drifts too much.  I’ve found that the GPS unit is only good for comparing in-session data and have found it to be in error of .25 seconds at least on one track.  Because of this drift, the data between different days and even sessions has to be shifted by eye until it “lines” up but with the e-Box, there is no drift and I can compare data from a year ago to new data.