[nmstoker]

You may already be aware of it, but the Bittle from Petoi may be of interest:

https://www.petoi.com/

Bittle is obviously not of the same size as the Go1 so won't be suited to the same practical tasks but if you're looking at exploring the control aspects it would serve as a good platform to learn on (for a substantially lower initial outlay). Petoi has the OpenCat repo and there are plenty of ways to hook it up to additional sensors or a remote system for more advanced guidance etc.

Edit: Mine arrived on Friday. It's great, although putting it together had a few challenges (the springs are a tough fit, but people figured workarounds on the forum)

[sheepdog]

Interesting. I didn't realize these were shipping yet. Seems like a good option for exploration!