Previous posts:
* inspiRED Leg Upgrade [step 0]: Fusion360 model
* inspiRED Leg Upgrade [step 1]: Laser Cutting Parts

I got some new longer shock absorber and designed new laser cutting parts to mount them for the leg of my humanoid bipedal robot project.

The previous shock absorber I used is basically too short and the legs cannot bend very well.

I also replaced the ankle parts and foot parts from 3D printing parts to laser cutting parts as well.

I realized two new problems:
* The legs still cannot bend since the corners where I put the spring mounting holes will collide to each other.
* And I need to put holes on the ankle base part, which be used to mount the foot spring hinge.