I allowed her to go through my hand and back into her enclosure with my thumb along her spine and my index finger along her belly. I felt 1 marble in her belly the first time a little more then 2/3rds the way down her body. I tried it a few more times to try and feel more but didn't even feel the one that I had felt before. Maybe she had just tensed up so I couldn't feel anything after the first time. I will try again here in a few minutes.
Try using a pillow case or snake bag to lessen friction while shes going through your hand, that will make it much easier as she won't tense up as much and you can push a little bit harder...when I palpate, my snake will squeeze down to 1/3 or so of her normal thickness