I created this model and rig a while ago. I followed the rigging tutorial by Polyfjord
I took a picture of spot robot from google search as a reference and did a quick low-poly model and used that image as texture.
You are pressing the “i want this” button after entering 0 in $ box right?. if so, seems to be problem with gumroad. Anyway I’m glad you were able to get it through sketchfab.
Great job, awesome rig. Thanks for sharing it free, you honor the Blender spirit
What about a little bevel on it? I think it would still be super low poly, and the edges would be a little more delicate, making justice to your great work.