You are not monopolizing anyones time, please don't ever think that. We are all here to chat and learn from each other.
I have never used flouride drops at all, why were they recommended? When I started to offer Riley water in a sippy at that age, I used filtered tap water or cooled boiled water, which the doctor said was fine. Maybe it has something to do with the water in your area?
Wow, he usually sleeps through fully! That's great. If you think he is hungry now that you are decreasing the solids, you could definitely offer to nurse more, and also decrease the solids at dinner gradually, so that your supply can gradually adjust. So if you were offering sat 3 ounces of food before, offer 2 and nurse again. KWIM?