Just a quick update, this is day 2 of moving to the bottle, breakfast, lunch, bottle, dinner, bottle. I think there are supposed to be snacks in there too, but hard to fit them in with naps right now.
He took more at his bedtime bottle last night and a bit more at his first bottle in the morning. He wanted to stop at 5oz again on bottle number 2, but we just waited a couple minutes and he drank the rest.
We've done everything pretty much cold turkey rather than slowly with DS, it seems to work fine for him, but usually we haven't made any changes until he's made it clear he's ready.