I think I'll give the Fat Boy a shot tomorrow. I have never used an adjustable before. I have been using a 40's or 50's superspeed with good luck both with Derby's and Merkur's. Every once in a while i get a little burn on the neck if I am in a hurry. I probably should not change things but I think I will like the added weight of the Fat Boy over the superspeeds. I'm going with a Derby blade but dont know about the setting. Start around 5?