Summary

an Raspberry Pi 3b and two Adafruit 16-channel servo controller boards are mounted above the plate, and two 2S batteries is held below the plate.
I also modified L-arm and R-arm because the horns of my 996R servos don't go down the slot, so I rised the edge of the slot.

Video: https://www.bilibili.com/video/av58391221/

github: https://github.com/hyansuper/spotmicro

unfortunally, I am unable to make the dog walk properly.