Wow, I wish my first grow was like yours! I would continue feeding at the higher levels as normal to encourage as much flower growth for the last few weeks and then flush the last anticipated week, it's what worked for me many years ago, but everyone will have a slightly different method. Maybe you could try the last week method out and if it doesn't work well for you, next time try a week and a half, or maybe last 4-5 days buddy. I definitely recommend trying out the last 48 hours in darkness.
You are doing an amazing job!
You are doing an amazing job!