About this 3D model

This piece is part of the "Caterpillator", a caterpillar tank-like robot. The whole project can be seen here http://www.thingiverse.com/thing:7752UPLOAD: Dannynoc has modified a little bit the piece, now it includes a hole in the upper part in order to save material. UPLOAD II: after www.thingiverse.com/obijuan printed the piece we saw a few things that could be improved, so new version uploaded in order to fixed a those things.