Adding the plunge lever (useful when mortising with a spiral bit), and depth stops to the side.
http://woodgears.ca/pantorouter/plung...

You can buy the plans for this (updated) pantorouter here:
http://woodgears.ca/pantorouter/plans

If you bought the pantorouter plans in the past, you can use the download link that was emailed to you at the time of purchase to download the latest version.