You guys seem to be confusing CG in flight with the moment created by the wheels being on the ground in a taildragger. They are not the same thing. Or maybe I'm just confused by the conversation. At any rate, weight behind the wheels, but in front of the CG is going to make the tail harder to lift when the wheels are on the ground, but will actually make it easier to lift the tail when the wheels are off the ground. This is because the plane doesn't rotate around the CG when the wheels are on the ground (it rotates around the wheels), but it does in flight.