Printrbot Simple Metal Tool Holder

I was searching for a tool holder for the PB simple metal but I didn't find any that I like so I decided to design my own. I got inspiration from the YATH Tool Holder for Replicator 2 from whpthomas, you can find it here: http://www.thingiverse.com/thing:38949.

The tool holder can carry the basic wrenches and spacer that come with any Simple Metal and I added some holes for a Spatula, metal brush, a caliper and two tweezers.

To mount the holder you'll use the four screws that are where the