I guess what I mean is that when Z was small he would do rubbish naps and I struggled to know what A time worked after these. Typically 35/45 mins throughout the day meant shaving off some of the next A time, how much was tough to know.
However, once we were in the 2-1 and he had a day like this
Nap 11-12.30 a CN was needed to get to BT without OT so a CN was offered ~4hrs after the nap for 20/30mins
BT 7 In the 2-1 support thread a lot of mums said 2-2.5hrs A after the 20/30 min CN to BT was typical and up to 3 hrs A after 35-40min CN
Tweaking away - 2hrs to BT worked well. Z moved to 1 nap relatively early (11mths the CN was gone) and looking back I think anything linger than that really would probably make an LO under the age of 9 mths OT by BT....KWIM?
Obviously some Los just cope - textbook angels are unlikely to be a mess, or NW/EW as much as a touchy LO which is what I had then
So I guess I was suggesting that anyting more than 2 hrs on a 20-30min nap (esp if the PM nap was the bust) would/could make LO OT.....you can only do your best though and we had days where we got 1 45 min nap all.day.....you just write those days off