It's always best to put it on the cg if possible.

One day you will have a great flight were you will perform a maneuver like a torque roll or rolling circle for the first time and you will be so excited that you will forget about the amount of fuel you have just used.

You will attempt to land and find the plane acting really tail heavy. You might have to go around a few times just to get use to it and this could lead to a dead stick at the wrong location.

Seem like I'm reaching but you will be amazed at how often this happens just when your day is going great.