How To Get Perfect Chalkboard Lettering

So you had a client request a big design for some chalkboards, easy enough right? But then you get into it and you've had to erase and start over multiple times, projects like this can turn into time and money sucks real fast. How do you create the perfect design without spending a ton of time on it? Here's a glimpse at my process for when I need more precision than just free-handing a chalkboard design.