[shergry]

We have the 4 step also, and had the top corners welded and 2nd step reinforced by welding. Repainted them in January and they still look good.
As for a mat covering the steps. DH took an outdoor rug (cheap black one from Wally $9.00 for all 4 steps) and cut to cover tops of step. Flat top bolts to make sure it stays down in this TX wind. Made sure when folding them up for storage down the road that it would do so with ease. Really happy with 4 versus 3, mainly because of old dogs.
A suggestion for those that stay for more than a week in a place. We went behind a grocery/mini-mart and found that pepsi/coke leave their pallets. After asking if the store was responsible or what their known policy was on these crates. Was able to take just one and cut it in 1/2 and it is perfect for support of the last step and makes it a lot easier to get in and out. I feel that when you have to open your door off the steps in order to get in that the crate gives that little height I need. Not 6'4" like DH!!
Just a suggestion.