It's a lot more difficult to do it this way, but i just like the idea and it means you can lean on the side of the truck on the way up the steps if maybe you are "tired" or something !
I started with a folding step system i bought, you could make it but i don't think you would get the finish of a proper manufactured one, its fully galvanized. i am using a fiberglass grating as the landing area, the idea is when you come out of the door there is a landing area before you go down the steps. Its also big enough to sit on, like a mini patio.
Fitting it all in around the fuel tanks with mm to spare was a challenge, I love it.