Today I thought I'd try out your idea, but with the exception of sticking with her usual a.m. nap from 8:30-9:00.
Well, she didn't go to sleep by 9am, and I had to go out, so I just got her up and got ready and left with her in the sling with me.
She stayed awake till about 11, then slept in the sling, but only for about 30 minutes.
Then, we got home and I kept her up as she was in a happy mood and her father was visiting us on his lunch hour.
At 1:30 I lied down and nursed her, and she slept from 2pm-5pm! Hooray, I am thrilled! I didn't know what to do with myself for so much time. I just kept looking at her sleeping - what a lovely sight!
And now she still went down for the night too!
So I'm going to keep on trying it for awhile and see what happens.