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I would get the new one and take the ball off the top and extend the whip about a foot and a half. Field testing has proven to me that the longer, 1/4 wavelength radials improve performance and that 31 feet was too long. The odd thing is that I think 3/4 wave is below the point of maximum gain on the horizon. All the models show 3/4 wave is the maximum but in the field we find the whip puts more signal on the distant horizon using this simple formula to set its length above the connector bracket. 9212 divided by frequency in MHz gives you length in inches for the main radiator.