I want to start looking at my swim heart rate, but am reluctant to add to my collection of chest straps with a HRM-Tri/Swim. I’ve got hold of a Polar OH1+ (I know, heresy but until you guys put similar out there…) as it allows for the sensor to be clipped to my goggles while swimming. Data is collected in the sensor, a bit like the HRM-Swim/Tri. How can I get that data synched to the activity data from my Garmin watch?