Originally Posted by Heathpack

Well I didn't claim you were worrying about it. It's just that I can't imagine why it would really matter to be "accurate" about it.

Distance, I can understand. I want to know when I'm getting close to the finish line in a TT. Or make the correct turn, if I'm trying to navigate a new area.

Power- that must be accurate and reliable, Im making training & racing decisions with that data.

Speed, I can understand. Maybe I've made and modification to the bike and I want to get a sense as to how it impacted speed.

Even temperature has some usefulness, because I can compare how I feel today when it's 47 degrees and it can help me decide how to dress tomorrow if its forecast to be 42 degrees.

But elevation gain? There's almost nothing I would do with that information that needs to be more accurate than 15% +/-. So I can't really see troubleshooting it or taking any steps to try to make that info more "accurate". Knowing that I deviate systematically from Ride with GPSs totals or my friends' Garmins is good enough.