Jerry, I think what you are saying is what is happening. It does look like a cardboard box twisting! And with your jack idea, I think I may be able to approach this. I couldn't budge them, but I am the mom of the house. I am hoping that once supported, my husband or one of my teenage boys will be able to. I plan on printing your reply so I have notes in hand, and will start at 39" to start. That side of the front shell does meet nicely with the back once closed, where as the og=ther side gaps a bit. Also perplexing, but definitely a starting point. Thank you.
Joseph, when opened, the shell looks fine. It is in the motion of closing that it seems to twist, so a picture would be difficult. However, thank you for considering my issue and trying to help. I think I have a new 4th of July weekend plan...
