I would say it’s pretty unlikely that you will shave half a second off of your time in 4 days, but here are some tips to help you improve. Focus on solutions and making sure that you are planning the whole V in inspection. Working on Full L4E recognition is very important as well. In the future, I would give yourself longer than 4 days to achieve a time goal, because it’s very hard to drop that amount of time in that short of time period.
Good luck!