Jolly, the fast turning Spit was probably using flaps and a chandelle. When you see one turn like this you know you have a worthy opponent. Remember to use your flaps (one notch usually) and he will not be able to out turn you. Zero pilots tend to get lazy and forget about flaps since it is rarely needed with most opponents.
Ack-Ack, you are correct except when down low. The diving aircraft, such as a FW, will have to shallow out its dive. Start turning gradually as the bogey closes so that it is already rolled into the turn. When it gets to within 1K range, break hard. Timed right, the higher speed aircraft will black out before being able to get the snap shot. Throw in a little vertical component to your break turn and they usually miss by a mile!
The worst position for a Zero is when a good rolling bogey is directly above it and there is enough altitude for a diving attack recovery. Then no matter which way the Zero turns the bogey gets a good shot. In this case the only thing for the Zero pilot to do is push the nose over and get near the ground. That is why I recommend staying below 5k with 3k being the ideal.