Translation Drills - How to know when to move on

Hi there,

I've done ~25 translation drills. I'm down to about 30 min (not the 20 recommended min.), but my accuracy is pretty good. I make about 3 accuracy mistakes and miss one premise per section. However, I am having to break up each stimulus into small chunks. Whenever I try to translate an entire stimulus (or even half a stimulus), I find myself leaving out more parts of the stimulus and making more mistakes. Assuming I can get my time down to 20 min, do I need to be concerned about translating the stimuli in chunks? One of the questions at the end of the basic translation drill answer sheet asks how many stimuli we are breaking in chunks? I would say I am currently breaking 80-90% of stimuli into chunks (unless they are very short). My question is, do I need to work on memorizing an entire stimulus at a time before moving on?