Marlon,
First off, Osborne's made two styles of compasses. One being the style you have and the other being the style I have. Second of all, Bob Douglas' versa groover does have an"L" shaped egde guide and not an "L" shaped blade. The best comparison that I can think of to the compass that I have is the one that Jeremiah Watt makes. It's darn near identical. I hope I was able to clear things up.