Well, we had a good nap on Sunday, 1h40, but then Monday and Tuesday 1h25 and 1h10. I did put him down at 12.15 both days after he woke at about 6.30. Today wu was 6.05, he fell asleep in the car for 10 mins at around 9.30 and now we've just put him down at 12.10.
I think I will try for another couple of days 12.15 and we'll see. WDYT?