Tfkaudio, hearing sibilance is not the best guide for VTA being too high (too many other variables). Assuming azimuth and overhang have been set correctly already, here's the most succinct description I know of on how to do the final fine-tuning for best sound:
http://www.walkeraudio.com/fine_tuning_your_turntable.htm
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http://www.walkeraudio.com/fine_tuning_your_turntable.htm
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