Great articles there Lakey, thanks.
As Kurt says, " The Riffler file is great for cleaning up old checkering as well as getting into tight spots near the borders. I'll admit that I didn't use one of these the first couple of years that I checkered, but when I finally got one I didn't know how I lived without it. With a little practice it will be a go-to tool in your checkering arsenal. "
We live and learn eh!...