Nice jig to make dattos and pocket squares

I like this build. Simple and easy to use. One thing I was thinking about for the square cut, maybe extending the arm so it can get support from both sides of the datto frame.

http://www.homemadetools.net/forum/ultimate-router-dado-template-jig-%7C-amazing-2-1-router-jig-%7C-unique-idea-74286?homelistings#post138721