Tomahawk - Electrical Vehicle (2016 Science Olympiad)

This is a straight driving Electric Vehicle for the 2016 division C Science Olympiad. It should be fully rules complaint but check dimensions before using this design.
Note: At time of upload, the design has not been tested in competition and has no guarantee of performance.
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Printed Parts needed:
1x T - Battery Holder
1x T - Tomahawk
1x T - Micro Servo Mount
1x T - .25 rod holder Pt 1
1x T - .25 rod holder Pt 2
2x or 4x CD/DVD Hubs http://www.thingiverse.com/thing:52384
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Optional Printed Parts:
T - Trim Tanks
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Hardware Needed:
18x M3 6mm Bolts:
http://www.amazon.com/MakerBeam-bolts-square-head-pack/dp/B00G2DNW3G/
or
http://www.amazon.com/MakerBeam-bolts-wing-type-head/dp/B00G2DNWK4/
21x M3 Nuts: http://www.amazon.com/gp/product/B000NBIH92/
3x M3 12mm Bolts: http://www.amazon.com/Makerbeam-Bolts-Square-Head-25pcs/dp/B00OXR1X5C
1x Wheel for Micro Servo https://www.adafruit.com/products/2744
1x Continuous Rotation Micro Servo https://www.adafruit.com/products/2442
1x 4 AA Battery Holder https://www.adafruit.com/products/830
1x Micro Controller
1x Makerbeam Extruded Aluminium Beams (300mm used in pictured cart): http://www.amazon.com/MakerBeam-300mm-beam-black-anodised/dp/B00G2DNU4M
1x 1' of #8-32 thread rod
4x #8-32 Nuts