Track saw kerf guide

I made this kerf guide to allow me to make precise cuts on the lumber sitting under the track.  Normally, the piece you cut to dimension is the one that you cut off, but with this guide the dimensioned part is the one sitting under the track.  You just mark a line where you want the edge of your cut, lay the track next to it and instead of laying the track right on the line, place the guide on the edge of the track and use the edge of the guide to line up your cut.  I use two of them to line up both ends.  You can also slide it back and forth to line it up at both ends if you only have one guide.