Actually, you do need to make some changes when going from upwind to the downwind.
1. Adjust mast rotation. ( for fulller main; how much depends on wind speed/boat speed)
2. Ease main traveler off center a bit (how much depends on conditions and boat)
3. Ease main sheet for some twist.
4. furl jib? ( I have a uni so I wouldn't know about that for sure)
5. Ease downhaul in light wind
Tom Turlington
F17 #12