This didn't 100% turn out quite how I intended (I had originally planned on the bit holders seating a little deeper), but the model I used as a rough starting point was a little smaller than the genuine Leatherman one and I didn't realize that until after printing.
But that being said, it actually still works perfectly for my needs, and I probably won't be making additional updates.
The author remixed this model.
Used this as a rough basis for the size of the holes. Unfortunately, it's a little bit narrow compared to the original bit holder, but it still works okay-ish.