That is not my trailer, Henry. I moved the link to Kevin's thread about the modification to make it easier to find. If it doesn't answer all your questions, you could try sending Kevin a PM.
I agree- very nicely done. I bookmarked it in case I ever want to do something similar.
For now, the front sofa on our Scamp
has a backrest that is more comfortably angled for lounging, reading, or watching video than the bolt-upright seats in most dinettes. Add a throw pillow or two and I am good!