I figured it was a hack job, but it had a similar idea. Making sense of it, was the struggle. I've made the decision not to attempt this myself, but I will pay attention to it in full. At least this will keep me from hiring in-experience or carelessness for that matter. For a 1st van swap, it's not as easy as a car, I can definitely say that.
Here's an idea: Maybe you or someone can make a detailed video of the process. I'd be willing to pay for it. For the most part, it don't have to be edited.