RETRO mini-bob

This retro-styled mini-bob is a simple design but it offers a lot of fun! Unfortunately I couldn't make a video up to now but here are two videos of the original bob:
https://www.youtube.com/watch?v=EU2a39ZfssQ
https://www.youtube.com/watch?v=uN_MRTIMHz4

Choose your team, print and assemble your mini-bob, build your own bobsled run and take the challenge: http://www.thingiverse.com/groups/bobsleigh-challenge

ASSEMBLING:
You also find a litte construction manual in the main-picture of the mini-bob. Beside the printed parts you need the following materials: glue, 8 screws (20 mm long; 3 x 16) and some weights (sinkers for fishing work great, or something else that's heavy).

For the assembling take the following steps and compare the pictures:
1. Combine the seal and the top-part. (use glue)
2. Fill up the bottom-parts empty segments with something heavy like lead (for example sinkers for fishing).
3. Combine the bottom- and the top-part
4. Attach the eight screws (3 x 16