LO is 5 months, we are trying to keep to 4-hour EASY. But about 50% of the time he takes 45-minute naps. PU/PD usually doesn't work once he's woken from the nap so we give up after about 15 min of PU/PD if he doesn't resettle.
Often this means that by the afternoon, we are in the situation where his next feed is falling exactly the time he should be going down for the next nap, if we give him about 2 hours A time after he woke up from the last nap.
What to do when his happens? Sometimes we try to extend the A time to 2.25-2.5 or sometimes 3 hours(!) and sometimes we feed a little earlier (0.5-1 hour earlier), but we're not sure what's the best solution.