Hey there, just wanted to bump this post. I am also trying to capture submeter accruacy using an Arrow 100 Blue tooth GPS unit. This unit is very similar to the SXblueII. Just wondering if there has been any movement in being able to select and make sure avenza maps is using the external GPS and not the internal gps of an ipad or other device. Is this somthing offered in the full version? I am only using the trial version at this point.