John:
Here are the pics from my trailer. I just use one support at the center of the bottom step. I think this takes a lot of the stress off of the steps system. One is enough trouble to adjust to ground height each time you set up. 2 supports would be twice the work.
First pic is just of my installation. NO cutting was needed for this, just the support foot has to be adjusted out so it is near the rear edge of the step tread for folding up the steps. 2 holes drilled in the bottom step mounts the support.
The next 2 photos are for EVERYBODY with the 4 step steps assembly that has it continually jam while folding it up. I found that it was jamming (both my old set that I got with the trailer and messed up in a "rubbing the fencepost" accident, and my new "insurance claim" set of steps) at the front and back corners of the bottom lip of the top step. I used pump pliers, a hammer, and vicegrips to bend the catching top step metal back inwards, out of the way. I don't think that this compromises the strength of the step assembly in any way.
Top Step Rear (left) corner:
Top Step Front (right) corner:
The steps as shown are part way folded up to show the corrected interference with the lower step's corner and stop button.