R2D2 Center Leg Mechanism

CenterFootHinge:

- Improved movement limiter
- use smooth rod instead of nut and bolt

Modified lifting mechanism:

- 2 smooth rods and 2 linear bearings
- one big screw


still under construction, i will post all files after it's finished

this is my first try and R2D2's first step :D
https://www.youtube.com/watch?v=UIyMfrLMVo4