My 2 cents is just stick to your original plan. Slips happen and just keep going forward. After the rigor of P1, there will be surprisingly intense urges to eat a lot, once the reins are loosened. They will subside once your body is used to getting more calories, if you don't try to overcompensate. If you are worried about not having a perfect phase off, it really isn't a one size fits all thing. The P3 carby breakfast made me so starving hungry the rest of the day that I had to stop it after a week.
Congrats on reaching your goal!!!