You need to re read that... lol!First it would depend on how close the gearing is before the change as to where and how many you would change, but for the most part If a certain combo as real close and you pull 1 off front you would then pull 3 from the rear, sometimes 4 in cases where track surface is maintaining a lot of momentum.
Ya Thanks first don't read on cell phone with out glasses, then re-read at least twice before posting lol !!You need to re read that... lol!