I have messed with friction fires quite a bit and I guess my favorite is a good horseweed hand drill on a cedar hearth board, I have also used a lot of different drills, mugwort, mullein, Jerusalem artichoke,cattail with a variety of hearth boards. Once and a while get my flint an steel out and use chaga or some milkweed ovum for my coals. My favorite but not always successful is the hand drill. Bob