Printrbot Simple back stabiliser

**Careful** : This piece is around **25cm** wide and can be printed on this : http://www.thingiverse.com/thing:282735.

It will be useful to stabilize your **Printrbot Simple** for large and heavy print beds (like glass). This model helps stabilize your Printrbot Simple a lot, but it's not enough.

More pieces to come. I'll update here.