Also worth mentioning is that there is NOTHING wrong with adding weight (within reason).

If weight were a bad thing, 747's would be covered with fabric and dope.

Depending on the airplane and power, a little extra weight can be a good thing - it helps to keep the plane stable and lets it cut through the air better.

many years ago, weight was a big consideration due to the lack of engine performance - And nowadays, with the 3-D craze, people are again going weight-crazy.

I recently added 22oz of lead to the nose of a GP Seawind which, from the factory has about a pound of BB's already in the nose.

Bottom line: it is better to add weight than try to fly an unbalanced airplane.