The feet are going to have to be bigger than the ones originally designed.
Bob said to make it lean 20-degrees before it would tip over.
I honestly think it will be so hard to tip these over, due to the fact that they weight 120 lb each.
So not only do you have to push them over, you have to LIFT the full 120 pounds as you tip it...
The feet being bigger than the extrusion, you'll have to lift it off the ground on 2 feet as you tip it.
There will be a few tests run to see just how small I can make it, and still have it stable.