Dean Grennel was one of my early influences while learning about this stuff, and he was big on making his own tools, gadgets, and gizmos. I have tried to do the same thing.
When I started casting, I needed something to knock the bullets out of the mold. RCBS makes something they call the Mold Mallet (bottom). I decided to make my own R.C.B.S. (Really Cheap Branch Stick) (top). I cut a branch to length, stripped the bark, and I've been using it ever since about 1988. I think it's time for a new one !