If you have access to a 3D printer, this helps explain the basics too: https://www.thingiverse.com/thing:3308710
yes this print is great, I was very surprised by the performance of the 3d printed spring. I did end up putting rubber bands on the rear wheels to give them more grip.
alt Hacker News
yes this print is great, I was very surprised by the performance of the 3d printed spring. I did end up putting rubber bands on the rear wheels to give them more grip.