As far as what call or striker works best, is totally up to you liking, only you can decide that. Alum is probably one of the easier surfaces to run a kee on, but a glass will do just as good and even a slate with the right striker. A hardwood works best, but that determined on how you play a call, if your an aggressive player or a soft touched player determines on what strikers work best for you? The main thing in running a kee kee is that you keep the exact amount of pressure down on your striker and keep the same angle on your striker all the way through the call.