I've seen some of Greg Paolini's videos where he uses his pocket rule and became intrigued. I then found out it was a one-time tool and no longer available until I recently got an email from ToolNut and Woodcraft that WoodPecker is creating another one-time tool run for the Paolini Pocket Rule. Anyone use one and is it worth the extra bucks? As of now I have a 6" stainless rule and a 6" combination square on my apron. The combo square is mainly used for marking. Is this a good replacement for both? Is it Accurate? Thanks!