I have finally finished reading the thread to the end . I use several techniques thumb up ,down, tucked , side . it depends on just what i am doing and what type of tool i am swinging or using . no one person has the correct answer 1 if they did we would all make the same type of metal working style and forgings that is what makes us all different and our work desirable to others , our unique style of hammering, filing, and finishing our work .
Sam JIMHO