But none with issues specifically with using Garmin Connect - which was my question. Do I need to use some sort of correction with Garmin Connect? Or is it GTC that needs correction? Which one is causing the problem, I have no idea, and I can't extrapolate that from the ST or MB discussions. Perhaps the solution is to ditch both.

I can find the discussions on other programs (I'm not a total dolt). I do appreciate the tutorial on searching though.