The current footpads provide all the stability I need but have always wondered about the rare case of an earthquake. The 1994 Northridge earthquake was 60 miles away and I remembered it violently shook for what seem like a long time. I didn't have the current lathe and wondered if it would remained standing with the current footpads.
I actually saw one of the Northridge earthquake aftershocks. My wife and I were playing doubles tennis and I was about to serve the tennis ball when about 400 yards away on the open grass green belt I could see what looked like a green undulating wave coming very fast toward us. Within seconds it hit us on the tennis court and hard to stand up and then gone. Being a geophysicist I thought this was so cool but I was the only one who was thrilled to be able to see an earthquake.