John, you are exactly right. I remember words from when I was a kid. If I start off reading them when I play though, it takes a lot longer to memorize them.
Sometimes the text file is open as a safety net. Since lately I've been using the EA7 a lot, I have realized I know a lot more words than I thought. I just did the entire Lyin' Eyes from memory and only missed a word or two. Never knew I could do that until I tried.
I've just added around 20 more songs to my Korg Songbook today, by the way.