Never thought to use nylon broom bristles, great idea. I ended up swapping my 15mm romans' pilums with a brass tube, plasticard, and pin concoction. Even more work but at least they all look like pilums now and won't snap.
Have been doing the same for my 15mm hoplites, worked extremely well, looking for thicker bristles for pikes and lances in my 28mm but hard to find so far.
