What are your Bone Broth tips and tricks? I have 5 chicken backbones in the freezer from spatchcocked chickens

I am considering this recipe to use up a bunch of backbones from spatchcocked chickens.

[https://40aprons.com/instant-pot-bone-broth-gels-whole30/](https://40aprons.com/instant-pot-bone-broth-gels-whole30/)

Any tips or tricks you have developed for bone broth?