I have a Forerunner 235 that I occasionally hook up to my PC to sync/update/charge/etc. I also recently got my daughter a FR 15. I've been switching the USB cables back and forth to connect the various watches (and once in a while for my eTrex GPS as well). I finally got tired of playing around with the cables, and plugged the FR 15 in the back of the computer, and still have the 235 cord in the front. Then a thought hit me, what happens if I connect both at the same time? Would Garmin Express be able to handle it? Or should I make sure I never connect more than one device at a time? Thanks for any feedback.