The BIG musts on the 109 are throttle, trim, and flaps. You can't pop them out at anything past 200mph to help with your instananeous turn, but they are really helpfull with sustained turns.
P.S., I don't know why, but for some reason, HTC chose to use the max deployment speed for the LANDING setting, or fully deployed, as the max deployment speed for the combat flaps. Same with removing the 30mm from the 109G-6, they just kind of came at us with that one out of the blue.