I'm sure some of you saw my post the other day acquiring an adjustable, but here goes: I purchased a 1963 Gillette I2 Slim adjustable and it came in the mail yesterday. Which setting should I start with? I've never used an adjustable before, and I think I'll wait to shave with it for the first time until Monday when I have a few days' growth, but I'm unsure where to start. I'm thinking about starting at 5 for the first WTG pass and then deciding whether or not I need to go up or down. The skin on my face is pretty tough and does not irritate easily, but my neck is very susceptible to irritation.