Thanks Martii
I have tried to pretty much cut out the rocking as it doesn't seem to calm him anyway, neither does the 4S. He starts fighting me. So, I have learned to move on and put him down. I realized that I may be putting him down too early as well, so thank you for noticing that. He does seem to show sleep cues pretty early for his first A time, but I do think he is ready to stay up longer. And I know I for sure am. Staying on short A times is rough.
Yesterday I was following the 3hr EASY and we had shorter naps (1.25h, 1h, 30m, 20m) I only tried to extend the 3rd and that took over an hour, so I gave up. The day before we had two good 2hr naps and a decent catnap. That seemed to really work well for him!
I am following PU/PD with shh/pat in his crib for naps and NW. I feed on demand so I am not following a strict E schedule except at NW I am making him wait 3.5-4+ hours depending on when he wakes. He is still waking multiple times a night which makes it difficult to hold him out. Sometimes we will have 2 NW before it's time to nurse. But I've learned he doesn't nurse well if I try to nurse him too soon.
He has notoriously been a bad sleeper with random miracles of 3 or 4 hr stretches, so I have high hopes with getting him so good quality sleep soon!