Has anyone living toward the end of a signal's coverage area found that Multi-Band 6 models do not sync as consistently as Multi-Band 5 or less models? As the weather turns cooler, I find that even in Manhattan (not a great area for atomic sync. generally because of all the buildings and r/f interference), most of my watches are sync'ing reliably. The two that are the least reliable are my two Multi-Band 6 models. They reside in a six slot watch box with four other atomic/sync. models and often are the only two watches in the box that don't sync. on a given night.