Good morning, I think a second test would be in order just to see if it's the hardware, software and we all know it's not operator error otherwise we wouldn't have what we do have. Have fun, Paul ----- Original Message ----- From: "Charles LaPierre" <charles@xxxxxxxxxxxxxxxx> Yeah not sure really, either of those could be the culprit I suppose. There is usually GPS lag as well so this probably has something to do with it. Oh well it wasn't designed for that really, there are other sensors on the market that can accurately track things like this, and you really need to be saving data every millisecond not once a second to really understand what is going on. Charles