In my case, I did not follow the 20:4 or the 16:8 because in my experience being rigid does not work well. I started out at 82kg and now at 73kg. All I did are as follows:
No rice for the first month, one cup a day after
Vegetables only (Salad or the vegetable components of nilaga and sinigang) for the first month
Little Soda (first 3 months, no soda, then occasional outside my house and work)
Reduced meat serving even up to today (In short, don't eat na sobrang busog)
I started out with maintenance maintenance meds but in the course of the year these were reduced gradually. One year ko nabawas yung 10kg pero di ako pressured gawin