thinking is make it like permanently attached ramps, attached front to back of door, just wide enough for tread, say 6 inches wide? I have seen something like that done previously on a different brand unit. sort of like this - https://www.bing.com/images/search?v...t=0&ajaxserp=0
Or you could get some loader ramps and make some attachment points in the cargo bay - various options. these are easliy portal, just an idea - https://www.northerntool.com/shop/to...2&gclsrc=3p.ds
Odd that it would have luan - I recall that the marketing for Challenger doors was that it was weather proof. Now I am more curious about the door on my Seismic. I few years ago I called to validate the construction, and could not get a straight answer at that time. Now with Lippert ownership, wondering if they are cheaping out to how Lippert used to make their doors, which we very prone to failure.