Originally Posted by
pakossa
What you may want to try are some uphill repeats: adjust the saddle 5 mm each time, keeping an eye on your speed/power/cadence. For me, adjusting the saddle fore/aft (or height) by 5 mm can literally double my speed or cut it in half going up a 12% grade! I'd use that as a determination for position well before using some formula.
5 mm => double your power output? Astonishing.