Just an FYI.....
This is gonna sound stupid and obvious to you guys with T-Handle release experience, but I'm not sure all the index release guys realize that you anchor very differently with this style release.
You don't anchor with the palm of your hand toward yur face......you need to rotate your hand , so that the back of your hand is toward your face and you actually anchor against the backside of your knuckles with your face.

If you try to shoot this in the same hand position as an index /wrist strap release you're gonna be a mess.