I've had great success with hazel hearths in the past but I went out today to collect some new material and came up with a new phenomenon - when I cleave the hazel I've collected it all has a sunwise twist to it! I tried it with a hatchet, a billhook and a knife just in case it was the tool nut I still got the twist. Was it just a series of flukes that I got clean cleaves in the past or is it just a run of twisted trees I've come across today?