645M and Stryd here (not had it long, still learning how to drive it)
I would suggest you join the Stryd facebook group – there are lots of helpful people on there who will be able to give you some advice on the capabilities of the Stryd/Fenix 5 pairing
You’re welcome, it’s a helpful group – some of them are really into the data analysis etc, but they sure know their stuff, and Gus from Stryd pretty much answers every question too – so it’s similar to here with Matt and David 🙂