I'm looking at purchasing a rear bag from Edgewood for my new 6mm Creedmoor rifle. My front rest is a Shadetree top on a Grizzly Bald Eagle. The rifle stock is a Manners MCS T4A. It would seem that the standard 3.5" height bag would align relatively closely with the minimum height on the Shadetree. I'm unsure on recommended ear spread. Any recommendations as to dimensions/options for the rear bag?