I just replaced ours. I talked to the Moride rep at the Tampa Rv show and he gave me a little brochure that had the critical measurements needed to accept their version of the steps. When we got back home and checked, our unit didn?t meet those specs. I found the Lippert steps at ETrailer (cheaper than the Moride) and called them to ask about clearance issues. The lady I talked with called Lippert, then called me back to say they would fit so I went ahead and ordered them. They are a simple instal, but I did run into a couple of issues probably specific to our trailer. When they are installed and in the UP position for travel, the stops on either side of the steps rest against the door flange and the clearance was so tight that the screen door had to be forced closed as the hinge side butted against the stop. I ended up cutting out the section of the flange that the stops contacted, then using some 1/8? flat aluminum stock, made sort of a ?bridge? that went over the cut out portion, and moved the contact area for the stops about 1/8? further into the trailer. That provided enough clearance with the steps up, for the door(s) to close without binding. It sounds complicated when I describe it here, but it makes sense in practice. All that being said, they make a huge difference, and other than that issue, was a simple installation. If not for that problem, I?d have had them installed by myself in around 45 min.