That will never happen-- my Patty will never be tail heavy even with an empty tank.

You are suppose to check the CG with the tank empty and I'm on the money as far as the CG goes. I'm sorry that I neglected to say I like my planes slightly nose heavy. For my type of flying it works best for me. When making a slow approach just before landing a nose heavy plane tends to keep air speed and has less chance to stall. A friend of mine lost an Edge this way. He was coming in a little slow, stalled at about 10 feet, caught a wing, cartwheeled and the Edge ended up in the local landfill. Again it's just my personal choice and may not work for all.