Heart Rate runner Datafield for Forerunner watches

Thanks! This works well and I like it but...

My older eyes have a hard time with the small fonts.

Personally, I could live with losing the time in zone in exchange for moving the other parameters around and enlarging them.

The HR text in the middle would be better black for me (although the low HR color would have to change).

Would like to be able to pick a few different parameters.

I do like how well the rolling average pace works, might be nice to be able to pick the avg. window.