Crib90 for a 17 month old taking 1 nap? Does it work?

My son is almost 17 months and we just got back from a 5-day international trip where we co-slept. He has done great going back to sleeping independently in his crib for nights, naps are another story.

Before we left, he would sleep on a mattress that is on his floor for naps, bedtime was still in the crib. I told myself when we got back from our trip that I would transition him into the crib for naps. The first nap was great but I think he was exhausted from the trip and every nap since I’ve had to be in the room for him to fall asleep and for every wake up during his nap. As I am typing this, I am rocking him because the moment I left after he was asleep, he shot up screaming again. I know I need to remove myself completely so he will fall asleep independently, so should I try crib90? Does it even work at this age? His WW’s are 5/6. Sometimes 5.5/6 if he wakes up at 6am (I don’t allow him to nap before 11:30am).