I've just received a new progress razor. Before I start to use it I have a question or two. I'll start with the lowest setting, but when I move up do you have to move a full number? Or can you just go up 1/2 turn or less. Also should I tighten it right down to the bottom and then start on the number 1? Anyone out there know the proper way to get started with this razor? Thanks for the advice.