private void nDrawLimit_ValueChanged( object sender, EventArgs e )
{
if ( selectedRank == null || !xDrawLimit.Checked )
return;
selectedRank.DrawLimit = Convert.ToInt32( nDrawLimit.Value );
double cubed = Math.Pow( Convert.ToDouble( nDrawLimit.Value ), 1 / 3d );
lDrawLimitUnits.Text = String.Format( "blocks ({0:0}\u00B3)", cubed );
}