You could always send her to me and I'll break her in for ya... I love snooty boas! They are so cute like that, haha.

I would not bump her meal size up, but I would bump her actual meals up. Feed her ever 4-5 days for a few times. Let her defecate that all out and THEN bump her size up. This way you won't stress those organs out so much with a big ole meal. I just say this cause I have only had problems with regurg cause of new snakes being on this "maintenance" feed schedule some bigger breeders use. They just can't handle the nice sized normal meal right off the bat. They need to be built up to it.