Rob,
Did you tryt the new Scott Wildcat release? I personally like that much better than the Copperhead, nicer trigger and a great loop release.......since I saw you are using a release this year.

My personal favorite loop release is the Scott Rhino.

You'll get a more natural fit and anchor with a loop specific release style than trying to figure out a proper fit on a longer barreled one.
I consider the Copperhead more of a long barreled release.......not quite like a Scott Mongoose but definitely not the style of a Wildcat or Rhino or Tru Ball Short and Sweet.