Hi Nicola,
Just letting you know we are in the same boat and this is what works for us. Z has 1 bottle in the afternoon, and 3 BF. We also were in the transition (well I thought) but since he has been unwell he is back to having four feeds, though his second one (11amish) is only 1 side now. I know he should probably be down to 3 by now, but at the moment this is working, and being BF I am not worrying to much yet.
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He drinks about 8oz of a full bottle (250mls/9ozs) in the arvo and is still happy for dinner an hour after.