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For right-hand wearers, would be helpful to be able to flip the watch face orientation so that the buttons are on the left side when wearing it on the right wrist. It would also be helpful to either be able to optionally rotate the watch face 90° or buy rigs for watch or arm band which switch the mounts to be 90° from where they are now. E.g. I'd actually like to wear the core on my left arm at some distance above my wrist.
"For right-hand wearers, would be helpful to be able to flip the watch face orientation so that the buttons are on the left side when wearing it on the right wrist." If you want to wear it that way couldn't you just select you wear it on the other hand? Why do you need a specific setting for that? But happy to take a look if there are any advantages. "It would also be helpful to either be able to optionally rotate the watch face 90°" -> This is not possible because the screens are not squares but two rectangles so it's not possible to rotate the user interface technically. It wouldn't fit. "or buy rigs for watch or arm band which switch the mounts to be 90° from where they are now." -> The included body strap rig is 90 degrees turned