Hi!

I bought Case & Soul and have been loving it; I had a question about something that was unclear to me.  There are tags like +fast or +slow with the Case designs; or +heavy with armour.  I couldn't find a section on what they do?  Do they change the position of the roll if they apply?

they're primarily narrative - they don't have a defined mechanical effect! if you think, for example, being slow would change your position in a situation, they can do that.  whatever feels appropriate!