Where did you pick up that piece of advice?
Size reduction is absolutely helpful, opening cells is not.
…and if what you started from was “trim”, there was zero need to further reduce the size.
What you want is not only on the outside of the cell wall, it is held up high for you to retrieve.
…don’t feel too bad about it, there are folks who’ve wasted tens of thousands of dollars on systems explicitly designed to open up every cell in search of cannabinoids…
Maybe try using activated charcoal when you winterize this time.