3D Printed Sumo Bot Parts

This is a mostly 3D printable sumo bot. It is going to be competing in the Science Olympiad sumo bot event. So far, the major vitamins we used are as follows...

- 1/8in x 1/2in aluminum rail
- Vex drive rod, sprockets, collars, and chains
http://www.vexrobotics.com/products/accessories/motion/276-2166.html
http://www.vexrobotics.com/products/accessories/motion/shafts.html
http://www.vexrobotics.com/products/accessories/motion/276-2010.html
- M4 screws and nuts
- Jaco foam tires (35 shore is what we are using)
http://www.jacoracing.net/nitroshoes_1_10.html
- Electronics
http://www.robotmarketplace.com/products/0-SABER2X5-RC.html
http://www.spektrumrc.com/Products/Default.aspx?ProdId=SPM5510
http://www.venom-group.com/itemdesc.asp?ic=15026
http://cgi.ebay.com/12V-120RPM-Powerful-High-Torque-Gear-Box-Electric-Motor-/290525929255?pt=LH_DefaultDomain_0&hash=item43a4b1df27
The offensive structure still needs to