Anyone have any experience with Sheppard scopes? I remember their gimmicky 2 plane reticle but I saw the "rugged" 3-9 on Dvor 50% off and the marketing got me. "Added strength to the turret assemblies, lens retainers, and interior support systems allow these scopes to take any punishment that the terrain or weapon can dish out without adding weight." Not often scope companies advertise zero retention and It look very similar on the outside to the swfa 3-9.