Would it be OK to show up to an in person interview with a written reference letter from a former colleague that's tailored to the position I'm interviewing for? If it's OK when should I present it, at the beginning or end?

Trying to think of every little thing I can to set myself apart and land this position!

I'm going to be meeting with 5 people from the company, and I'll have 5 copies of my resume printed on thick resume paper to hand out to them all.

Also how about bringing notes to an interview? I'll of course have my own pen and paper to jot things down as needed.

Should I extend my thank you email to just the managers or to all participants in the interview?