I opted to keep the existing bar ends, (they come with their own) and used an alternative mounting bracket from Amazon (see image) as I didn't like the looks of the bracket going over the top of each reservoir.
They do well for deflecting wind around the hands...sonsome warmth in cooler weather, but when it's cold, I just throw on my hippo hands and enjoy the heated grips!
The thing I like the most is not getting pelted with rocks and bugs in the hands. Hand a few good thwacks over the years and one broken finger from a passing logging truck pitching a rock.