Reduced takeoff power setting

Hi all.After reading abaout the "shortcut" to setting correct reduced power setting for takeoff (the lower white hashmark), I was wondering if anyone could point me in the direction of the actual tables for setting the exact powersetting based on the assumed higher temp, runway length, TOW and so forth...? As Rod explains in the the tutorial, the lower white hashmark is correct ALMOST every time. That's not good enough for me ;)They must be somewhere? Hope not in the documentation, because then I ovelooked it...Thx for your help!Mas