I didn't realise you'd tried the 11am nap for so long. In which case I am going to suggest the opposite to what I normally would - give I read you have also tried an earlier nap. I would go for a noon nap and see what happens, I know there are some LOs who go straight from 2 naps to one nap with a 7hr A time and then sleep 2hrs+ but they *have* to have that long morning A time. Do you think that's worth a shot?