Widget, it is a built in Victa self destruct method so that people have to replace their mower. The Powertorque motors are strong and will well outlast the bases. I just fish oil them, at least a lot better protection than Victa gave them. Just check the Tornado base, I think it might be deeper. I have a Victa base here that appears much deeper, but I haven't really looked at that one, it is sitting there for ron, lateron when I have nothing else to do. laugh