3mm thick plate for Tamiya Universal Plate.
This is a 100mm x 60mm x 3mm plate that can be used with the Tamiya 2" offset (http://www.thingiverse.com/thing:778659) to build another layer. Holes are offset to line up with holes on the Tamiya Universal Plate. I am using this to hold a battery and arduino for a robot. Included are the STL and OpenSCAD files.