I started 3,5h EASY mainly because he wasn't hungry at 3h mark, secondly because he has increased his A time (when you have 1:45-2:00 A his naps even when good, had to be capped after 1:00 for feed and he was not hungry....?). I went cold turkey but he was ready especially for feeding. First day he woke after 50min from his 2nd nap - I was terrified... 1:30 till next feed! But we just managed to do it without any crying. He was not hungry.
Then morning feeds went into 3:45 break and it was also his decision, he just slept longer on his nap. Right now, when he wakes earlier from his nap, I just keep feeding hours strict so not to confuse him and he is fine with it. Only in the afternoon we have shorter breaks and I am fine with it, he is still taking full feeds and I guess he is tanking for night. Frankly speaking I am not even eager to go to 4h EASY and lose one feed, as I guess the more he takes during day, the less he will wake at night:). Btw at DF he can drink from 4 to even 7oz so I know that he needs this feed & needs more milk for night.