I have also modified the Soul Gem item so that it no longer affects breast size, and I'll share it here for other players who aren't fond of tiddy monsters.
https://drive.google.com/file/d/1F0WscP6w3HvV6PN4s6HrVenylApL8Z3r/view?usp=shari...
Just extract directly into the Mods folder. The folders will put it where it needs to go. It's just an 8kb .txt file.