Here are a series of photos showing how to install a Tortoise Stitch machine in foam.
The best way to view this series is to click on the fist image to see a larger version and the description test. Then use the nest link in the upper right to walk through the steps.

<><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
NOTE: I have replaced the styrene sheet with a piece of 1/4" masonite.
<><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>