Spectra & The Force Factor

When I string up a Spectra handle I make it 4' 9.5" long which is 1.5" short of actual.  The reason why is because the Spectra initially stretches with most male short line skiers stretching it out to 4' 11". My pro skiers stretch the Spectra 3"! That demonstrates the difference in force needed to get into 41' off.