It was a long time ago, but I also remember a 2 week switching time. I was pretty good by the end of the first week, but after taking a weekend off, the worst

It was a long time ago, but I also remember a 2 week switching time. I was pretty good by the end of the first week, but after taking a weekend off, the worst day was the following Monday -- I couldn't remember any layout and couldn't type at all without reference to a diagram!