Adam in Iowa is using the nose cone with a 5×5 swing panel for lined ground squirrels. He places the nose cones over the dens, then sets the 5×5 Comstock double door swing panel trap into the nose cone just like you would set for woodchucks. In this way you can of course catch the squirrels coming or going, head and shoulders over using single door traps that will only catch animals coming from the den.
Brad in Mississippi is catching multiple squirrels in the swing panel traps at positive den sites. One gets caught while the others simply force their way in like a repeater.