Sydney, about your sleep positioners - can you slide them closer together so that her little body is sandwiched between them and is forced to be less flat? The ones I bought had velcro so you could adjust the width.
I am new to shushpat but here is what I am learning about my 7 wo Touchy/Textbook baby's sleep (might be useful for other Touchy babies so I'll post it:
1) I do not make eye contact with her as it encourages her to stay awake
2) I do not put music on, it becomes too overstimulating when combined with shushpat.
3) her constant wriggling while in my arms is because she is tired. I just keep holding her until I see her eyes start to droop
4) I don't pat too fast and sometimes no patting at all - I pat for a few minutes and see how she responds to it. If I feel it is overstimulating her I stop. If I do pat, she prefers her butt rather than her back.
5) If I lay her down in her crib and she is trying to break free from her swaddle like a madperson, she is not ready for the crib (could be OT or not tired enough), I just pick her up and hold her until she settles and eyes become droopy etc.
6) Sometimes, my presence disturbs her so I will place my hand on her chest and move so she cannot see me. Her bassinet/crib is right next to my bed so I lay on my bed with my arm outstretched into her bassinet. I have fallen asleep in that position! I wake up a half hour later when she starts to stir so I apply a little pressure.
7) I don't rush in right away when I hear her waking at the 40 minute mark as she will often settle herself down and go back to sleep. I wait for the all out cry.

Shushing loudly upsets her more, I just shush at a normal voice and lower my voice as she starts to settle.
That's all for now. I still have lots more to learn about her. Touchy babies are just so....touchy! My DS was a textbook baby - so much easier!
Also question on the length of sleep - does this hold true for babies (I remember this from sleep training my son):
20 minute sleep = doesn't know how to get herself into next round of sleep?
30 minute sleep = OT baby?
45 minute sleep = undertired?
Thanks so much