Anyone used a Garmin HRM with a Bryton 35 or 50

My Edge 305 has given up the ghost so I am looking to replace it. Initially I was looking at an Edge 500 but am tempted by either a Bryton 30 or 50. I have a Garmin HRM and cadence sensor so would only need the base unit hopefully. Searching google I can find people who have paired the cadence sensor with a Bryton unit but not the HRM I have found 1 wiggle review saying they coundn’t pair them, my HRM is the older type not the soft strap version. Anyone have experience with pairing them?